diff --git a/src/main/java/site/kikihi/custom/platform/adapter/in/web/CustomKeyboardController.java b/src/main/java/site/kikihi/custom/platform/adapter/in/web/CustomKeyboardController.java
index 3efaf06..10b7e3b 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/in/web/CustomKeyboardController.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/in/web/CustomKeyboardController.java
@@ -135,6 +135,9 @@ public ApiResponse<SliceResponse<ProductListResponse>> getCustomKeyboardProducts
         /// 서비스
         Slice<ProductListResponse> content = service.getCustomProducts(userId, category.getValue(), layout, pageable);
 
+        /// 개수 조회
+        Long counts = service.getCustomProductCounts(category.getValue(), layout);
+
         /// DTO 변경
         Slice<ProductListResponse> dtoSlice = new SliceImpl<>(
                 content.getContent(),
@@ -143,7 +146,7 @@ public ApiResponse<SliceResponse<ProductListResponse>> getCustomKeyboardProducts
         );
 
         /// 응답
-        return ApiResponse.ok(SliceResponse.from(dtoSlice));
+        return ApiResponse.ok(SliceResponse.from(dtoSlice, counts));
     }
 
     /**
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/request/custom/CustomKeyboardRequest.java b/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/request/custom/CustomKeyboardRequest.java
index c3c4c36..06bf921 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/request/custom/CustomKeyboardRequest.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/request/custom/CustomKeyboardRequest.java
@@ -26,6 +26,9 @@ public class CustomKeyboardRequest {
     @Schema(description = "키캡 ID", example = "keycap_29")
     private String keyCapId;
 
+    @Schema(description = "악세사리 ID", example = "accessory_id")
+    private String accessoryId;
+
     @Schema(description = "커스텀 키보드 이름", example = "내 인생 첫 커스텀 65키")
     private String name;
 
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/custom/CustomKeyboardDetailResponse.java b/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/custom/CustomKeyboardDetailResponse.java
index 34ede59..2ec157f 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/custom/CustomKeyboardDetailResponse.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/custom/CustomKeyboardDetailResponse.java
@@ -21,24 +21,39 @@
         description = "커스텀 키보드의 상세 정보를 조회하는 응답 DTO입니다."
 )
 public record CustomKeyboardDetailResponse(
-        @Schema(description = "커스텀 키보드 ID", example = "101")
+        @Schema(description = "커스텀 키보드 ID", example = "1")
         Long customId,
 
         @Schema(description = "커스텀 키보드 이름", example = "타건감 좋은 65키 키보드")
         String customName,
 
-        @Schema(description = "커스텀 키보드 타입", example = "65%")
+        @Schema(description = "커스텀 키보드 타입", example = "60배열")
         String customKeyboardType,
 
+        @Schema(description = "하우징 상품 ID", example = "68b3f4fedc26d32d8881fe12")
+        String housingId,
+
         @Schema(description = "하우징(프레임) 이름", example = "TX-65")
         String housingName,
 
+        @Schema(description = "키캡 ID", example = "GMK Red Samurai")
+        String keyCapId,
+
         @Schema(description = "키캡 이름", example = "GMK Red Samurai")
         String keyCapName,
 
-        @Schema(description = "스위치 이름", example = "Gateron Ink Black v2")
+        @Schema(description = "스위치 ID", example = "689d4fd15f80b10f1691fc96")
+        String switchId,
+
+        @Schema(description = "스위치 이름", example = "게이트론 브라운 스위치 (10개) - 갈축 10개")
         String switchName,
 
+        @Schema(description = "악세사리 ID", example = "68baf9e37de370ef29647eb1")
+        String accessoryId,
+
+        @Schema(description = "악세사리 이름", example = "아크릴 키보드 덮개 케이스 커버 보관함 방진 중형 보호 먼지 차단 투명 수납함 정리함")
+        String accessoryName,
+
         @Schema(description = "썸네일 이미지 URL", example = "https://example.com/custom/101.jpg")
         String thumbnail,
 
@@ -52,9 +67,14 @@ public static CustomKeyboardDetailResponse from(CustomKeyboardWithName entity){
                 .customId(entity.id())
                 .customName(entity.name())
                 .customKeyboardType(entity.layout())
+                .housingId(entity.frameId())
                 .housingName(entity.frameName())
+                .keyCapId(entity.keyCapId())
                 .keyCapName(entity.keyCapName())
+                .switchId(entity.switchId())
                 .switchName(entity.switchName())
+                .accessoryId(entity.accessoryId())
+                .accessoryName(entity.accessoryName())
                 .thumbnail(entity.imageUrl())
                 .price(entity.totalPrice())
                 .build();
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/product/ProductListResponse.java b/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/product/ProductListResponse.java
index 549ddf0..5bd1575 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/product/ProductListResponse.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/in/web/dto/response/product/ProductListResponse.java
@@ -1,6 +1,7 @@
 package site.kikihi.custom.platform.adapter.in.web.dto.response.product;
 
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import site.kikihi.custom.platform.domain.product.Product;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Builder;
@@ -21,6 +22,7 @@
  * @param discountedPrice   가격 (기존 DTO 컬럼과 동일하게 유지)
  */
 
+@JsonInclude(JsonInclude.Include.NON_NULL)
 @Builder
 @Schema(name = "[응답][상품] 상품 목록 조회 Response", description = "상품 목록 조회를 위한 DTO입니다.")
 public record ProductListResponse(
@@ -31,6 +33,9 @@ public record ProductListResponse(
         @Schema(description = "상품 썸네일 이미지 URL", example = "https://example.com/product/101.jpg")
         String thumbnail,
 
+        @Schema(description = "상품 매핑 이미지 URL", example = "https://example.com/product/101.jpg")
+        String mappingUrl,
+
         @Schema(description = "카테고리명", example = "keycap")
         String category,
 
@@ -53,6 +58,7 @@ public static ProductListResponse from(Product product) {
                 .id(product.getId())
                 .thumbnail(product.getThumbnail())
                 .category(product.getCategory())
+                .mappingUrl(product.getMapping())
                 .manufacturerName(product.getManufacturer())
                 .productName(product.getName())
                 .discountedPrice(getPrice(product))
@@ -81,6 +87,7 @@ public static ProductListResponse from(Product product, boolean likedByMe) {
         return ProductListResponse.builder()
                 .id(product.getId())
                 .thumbnail(product.getThumbnail())
+                .mappingUrl(product.getMapping())
                 .category(product.getCategory())
                 .manufacturerName(product.getManufacturer())
                 .productName(product.getName())
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/in/web/swagger/CustomKeyboardControllerSpec.java b/src/main/java/site/kikihi/custom/platform/adapter/in/web/swagger/CustomKeyboardControllerSpec.java
index fd94283..ecbe015 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/in/web/swagger/CustomKeyboardControllerSpec.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/in/web/swagger/CustomKeyboardControllerSpec.java
@@ -1,5 +1,6 @@
 package site.kikihi.custom.platform.adapter.in.web.swagger;
 
+import io.swagger.v3.oas.annotations.Parameter;
 import site.kikihi.custom.global.response.ApiResponse;
 import site.kikihi.custom.global.response.page.PageRequest;
 import site.kikihi.custom.global.response.page.SliceResponse;
@@ -52,13 +53,15 @@ ApiResponse<Void> createCustomKeyboard(
 
     /**
      * 키보드 상세 조회
-     * @param customKeyboardId  키보드 ID
+     *
+     * @param customKeyboardId 키보드 ID
      */
     @Operation(
             summary = "커스텀 키보드 상세 조회 API",
             description = "커스텀 키보드를 상세 조회합니다."
     )
     ApiResponse<CustomKeyboardDetailResponse> getCustomKeyboard(
+            @Parameter(example = "1")
             @PathVariable Long customKeyboardId);
 
 
@@ -112,9 +115,10 @@ ApiResponse<Void> deleteCustomKeyboard(
     String REQUEST = """
             {
               "layout" : "PERCENT_60",
-              "housingId" : "68b3f4fedc26d32d8881fdff",
-              "switchId" : "686bd26d34c3c12ea9b8e7e3",
-              "keyCapId" : "68b3f653dc26d32d8881fe3d",
+              "housingId" : "68b3f4fedc26d32d8881fe12",
+              "switchId" : "689d4fd15f80b10f1691fc96",
+              "keyCapId" : "68b3f653dc26d32d8881fe43",
+              "accessoryId" : "68baf9e37de370ef29647eb1",
               "name" : "테스트 커스텀"
             }
             """;
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/out/ProductMongoAdapter.java b/src/main/java/site/kikihi/custom/platform/adapter/out/ProductMongoAdapter.java
index 1b48ee6..fe40e07 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/out/ProductMongoAdapter.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/out/ProductMongoAdapter.java
@@ -140,12 +140,22 @@ public Slice<Product> getProductsAndCategoryByType(String type, String categoryI
                 .map(ProductDocument::toDomain);
     }
 
+    @Override
+    public Long getProductsAndCategoryByType(String type, String categoryId) {
+        return documentRepository.countByTypeAndCategoryAndIsCustomTrue(type, categoryId);
+    }
+
     @Override
     public Slice<Product> getProductsByCategoryAndCustom(String categoryId, Pageable pageable) {
         return documentRepository.findByCategoryAndIsCustomTrue(categoryId, pageable)
                 .map(ProductDocument::toDomain);
     }
 
+    @Override
+    public Long getProductsByCategoryAndCustom(String categoryId) {
+        return documentRepository.countByCategoryAndIsCustomTrue(categoryId);
+    }
+
 
     /**
      * 상품 개수 조회
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/out/jpa/custom/CustomKeyboardJpaEntity.java b/src/main/java/site/kikihi/custom/platform/adapter/out/jpa/custom/CustomKeyboardJpaEntity.java
index ae603ef..dfe468f 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/out/jpa/custom/CustomKeyboardJpaEntity.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/out/jpa/custom/CustomKeyboardJpaEntity.java
@@ -30,6 +30,8 @@ public class CustomKeyboardJpaEntity extends BaseTimeEntity {
 
     private String keyCapId;
 
+    private String accessoryId;
+
     private String name;
 
     private String imageUrl;
@@ -45,6 +47,7 @@ public static CustomKeyboardJpaEntity from(CustomKeyboard entity) {
                 .frameId(entity.getFrameId())
                 .switchId(entity.getSwitchId())
                 .keyCapId(entity.getKeyCapId())
+                .accessoryId(entity.getAccessoryId())
                 .name(entity.getName())
                 .imageUrl(entity.getImageUrl())
                 .layout(entity.getLayout())
@@ -59,6 +62,7 @@ public CustomKeyboard toDomain(){
                 .frameId(frameId)
                 .switchId(switchId)
                 .keyCapId(keyCapId)
+                .accessoryId(accessoryId)
                 .name(name)
                 .imageUrl(imageUrl)
                 .layout(layout)
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocument.java b/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocument.java
index 3e7c869..3f5e0bf 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocument.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocument.java
@@ -35,6 +35,9 @@ public class ProductDocument {
     @Field("thumbnail")
     private String thumbnail;
 
+    @Field("mapping")
+    private String mapping;
+
     private String manufacturer;
 
     @Field("detail_page_url")
@@ -65,6 +68,7 @@ public Product toDomain(){
                 .price(price)
                 .description(description)
                 .thumbnail(thumbnail)
+                .mapping(mapping)
                 .manufacturer(manufacturer)
                 .detailPageUrl(detailPageUrl)
                 .options(options)
diff --git a/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocumentRepository.java b/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocumentRepository.java
index 9ac68dd..8b51a46 100644
--- a/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocumentRepository.java
+++ b/src/main/java/site/kikihi/custom/platform/adapter/out/mongo/product/ProductDocumentRepository.java
@@ -79,6 +79,11 @@ Slice<ProductDocument> findByTypeAndCategoryAndIsCustomTrue(
             Pageable pageable
     );
 
+    @Query(value = """
+  { 'type': ?0, 'category': ?1, 'is_custom': true }
+""", count = true)
+    Long countByTypeAndCategoryAndIsCustomTrue(String type, String category);
+
     @Query("""
     {
       'category': ?0,
@@ -90,6 +95,14 @@ Slice<ProductDocument> findByCategoryAndIsCustomTrue(
             Pageable pageable
     );
 
+
+    @Query(value = """
+  {'category': ?0, 'is_custom': true }
+""", count = true)
+    Long countByCategoryAndIsCustomTrue(String category);
+
+
+
     /// 아이디 기반 조회
     Slice<ProductDocument> findByIdIn(List<String> ids, Pageable pageable);
 
diff --git a/src/main/java/site/kikihi/custom/platform/application/in/custom/CustomKeyboardUseCase.java b/src/main/java/site/kikihi/custom/platform/application/in/custom/CustomKeyboardUseCase.java
index 6f0e135..fe17586 100644
--- a/src/main/java/site/kikihi/custom/platform/application/in/custom/CustomKeyboardUseCase.java
+++ b/src/main/java/site/kikihi/custom/platform/application/in/custom/CustomKeyboardUseCase.java
@@ -40,6 +40,9 @@ public interface CustomKeyboardUseCase {
     // 배열에 맞는 상품 조회하기
     Slice<ProductListResponse> getCustomProducts(UUID userId, String categoryId, CustomKeyboardLayout type, Pageable pageable);
 
+    // 배여에 맞는 상품 개수 조회하기
+    Long getCustomProductCounts(String categoryId, CustomKeyboardLayout type);
+
 
     /// 삭제
     void deleteCustomKeyboard(Long customKeyboardId, UUID userId);
diff --git a/src/main/java/site/kikihi/custom/platform/application/out/product/ProductPort.java b/src/main/java/site/kikihi/custom/platform/application/out/product/ProductPort.java
index e88403a..8c4739c 100644
--- a/src/main/java/site/kikihi/custom/platform/application/out/product/ProductPort.java
+++ b/src/main/java/site/kikihi/custom/platform/application/out/product/ProductPort.java
@@ -50,8 +50,14 @@ public interface ProductPort {
 
     Slice<Product> getProductsAndCategoryByType(String type, String categoryId, Pageable pageable);
 
+    // 개수
+    Long getProductsAndCategoryByType(String type, String categoryId);
+
     Slice<Product> getProductsByCategoryAndCustom(String categoryId, Pageable pageable);
 
+    // 개수
+    Long getProductsByCategoryAndCustom(String categoryId);
+
     /// 상품 개수 조회
     Long getProductsCount(String category);
 
diff --git a/src/main/java/site/kikihi/custom/platform/application/service/CustomKeyboardService.java b/src/main/java/site/kikihi/custom/platform/application/service/CustomKeyboardService.java
index e6171fc..49c55f0 100644
--- a/src/main/java/site/kikihi/custom/platform/application/service/CustomKeyboardService.java
+++ b/src/main/java/site/kikihi/custom/platform/application/service/CustomKeyboardService.java
@@ -25,6 +25,7 @@
 
 import java.util.*;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 /**
  * 키보드 커스텀 서비스
@@ -61,8 +62,15 @@ public CustomKeyboard saveCustomKeyboard(CustomKeyboardRequest request, UUID use
         var switchProduct = getProduct(request.getSwitchId());
         var keyCapProduct = getProduct(request.getKeyCapId());
 
+        /// 악세사리 (선택)
+        String accessoryId = null;
+        if (request.getAccessoryId() != null && !request.getAccessoryId().isBlank()) {
+            var accessoryProduct = getProduct(request.getAccessoryId());
+            accessoryId = accessoryProduct.getId();
+        }
+
         /// 객체 생성
-        var customKeyboard = CustomKeyboard.of(userId, request.getLayout(), frameProduct.getId(), switchProduct.getId(), keyCapProduct.getId(), request.getName(), "thumbnail");
+        var customKeyboard = CustomKeyboard.of(userId, request.getLayout(), frameProduct.getId(), switchProduct.getId(), keyCapProduct.getId(), accessoryId, request.getName(), "thumbnail");
 
         /// 저장 후 리턴
         return port.saveCustomKeyboard(customKeyboard);
@@ -102,12 +110,16 @@ public Slice<CustomKeyboardWithName> getCustomKeyboards(UUID userId) {
         }
 
         /// 필요한 모든 productId를 한 번에 수집
-        Set<String> allProductIds = new HashSet<>();
-        keyboards.forEach(k -> {
-            allProductIds.add(k.getFrameId());
-            allProductIds.add(k.getSwitchId());
-            allProductIds.add(k.getKeyCapId());
-        });
+        Set<String> allProductIds = keyboards.stream()
+                .flatMap(k -> Stream.of(
+                        k.getFrameId(),
+                        k.getSwitchId(),
+                        k.getKeyCapId(),
+                        k.getAccessoryId() // null 포함 가능, 아래에서 안전 처리
+                ))
+                .filter(Objects::nonNull) // null 제거
+                .collect(Collectors.toSet());
+
 
         /// productId로 한 번에 조회 (N+1 방지 핵심)
         Map<String, Product> productMap = getProductsByIds(allProductIds);
@@ -118,8 +130,9 @@ public Slice<CustomKeyboardWithName> getCustomKeyboards(UUID userId) {
                     var frameProduct = productMap.get(keyboard.getFrameId());
                     var switchProduct = productMap.get(keyboard.getSwitchId());
                     var keyCapProduct = productMap.get(keyboard.getKeyCapId());
+                    var accessoryProduct = productMap.get(keyboard.getAccessoryId());
 
-                    return CustomKeyboardWithName.of(keyboard, frameProduct, switchProduct, keyCapProduct);
+                    return CustomKeyboardWithName.of(keyboard, frameProduct, switchProduct, keyCapProduct, accessoryProduct);
                 })
                 .toList();
 
@@ -144,8 +157,18 @@ public CustomKeyboardWithName getCustomKeyboard(Long customKeyboardId) {
         var switchProduct = getProduct(keyBoard.getSwitchId());
         var keyCapProduct = getProduct(keyBoard.getKeyCapId());
 
+        String accessoryId = null;
+        if (keyBoard.getAccessoryId() != null && !keyBoard.getAccessoryId().isBlank()) {
+
+        }
+
+        // 악세사리가 존재하면 조회
+        var accessoryProduct = keyBoard.getAccessoryId() != null && !keyBoard.getAccessoryId().isBlank()
+                ? getProduct(keyBoard.getAccessoryId())
+                : null;
+
         /// 응답
-        return CustomKeyboardWithName.of(keyBoard, frameProduct, switchProduct, keyCapProduct);
+        return CustomKeyboardWithName.of(keyBoard, frameProduct, switchProduct, keyCapProduct, accessoryProduct);
 
     }
 
@@ -160,10 +183,6 @@ public CustomKeyboardWithName getCustomKeyboard(Long customKeyboardId) {
     public Slice<ProductListResponse> getCustomProducts(UUID userId, String categoryId, CustomKeyboardLayout type, Pageable pageable) {
 
         Slice<Product> products;
-        log.info("userId : {}", userId);
-        log.info("categoryId : {}", categoryId);
-        log.info("type : {}", type);
-        log.info("pageable : {}", pageable);
 
         /// 타입을 바탕으로 조회하기
         /// 하우징인 경우
@@ -181,6 +200,27 @@ else if (categoryId.equals(CategoryType.KEYCAP.getValue())) {
         return toProductListResponse(userId, categoryId, products);
     }
 
+
+    /**
+     * 키보드 배열을 바탕으로 가능한 상품 개수 조회
+     *
+     */
+    @Override
+    public Long getCustomProductCounts(String categoryId, CustomKeyboardLayout type) {
+
+        /// 타입을 바탕으로 조회하기
+        /// 하우징인 경우
+        if (categoryId.equals(CategoryType.HOUSING.getValue())){
+            return productPort.getProductsAndCategoryByType(type.getDb(), categoryId);
+        }
+        /// 키캡인 경우
+        else if (categoryId.equals(CategoryType.KEYCAP.getValue())) {
+            return productPort.getProductsByCategoryAndCustom(categoryId);
+        } else {
+            return productPort.getProductsCount(categoryId);
+        }
+    }
+
     // =================
     //  삭제 함수
     // =================
diff --git a/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboard.java b/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboard.java
index 916d11a..3a03b7f 100644
--- a/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboard.java
+++ b/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboard.java
@@ -24,6 +24,8 @@ public class CustomKeyboard extends BaseDomain {
 
     private String keyCapId;
 
+    private String accessoryId;
+
     private String name;
 
     private String imageUrl;
@@ -31,7 +33,7 @@ public class CustomKeyboard extends BaseDomain {
     private CustomKeyboardLayout layout;
 
     /// 정적 팩토리 메서드
-    public static CustomKeyboard of(UUID userId, CustomKeyboardLayout layout, String frameId, String switchId, String keyCapId, String name, String imageUrl) {
+    public static CustomKeyboard of(UUID userId, CustomKeyboardLayout layout, String frameId, String switchId, String keyCapId, String accessoryId, String name, String imageUrl) {
 
         return CustomKeyboard.builder()
                 .userId(userId)
@@ -39,6 +41,7 @@ public static CustomKeyboard of(UUID userId, CustomKeyboardLayout layout, String
                 .frameId(frameId)
                 .switchId(switchId)
                 .keyCapId(keyCapId)
+                .accessoryId(accessoryId == null ? "" : accessoryId)
                 .name(name)
                 .imageUrl(imageUrl)
                 .build();
diff --git a/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboardWithName.java b/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboardWithName.java
index 7b9648a..f951e28 100644
--- a/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboardWithName.java
+++ b/src/main/java/site/kikihi/custom/platform/domain/custom/CustomKeyboardWithName.java
@@ -35,15 +35,25 @@ public record CustomKeyboardWithName(
         String switchName,
         String keyCapId,
         String keyCapName,
+        String accessoryId,
+        String accessoryName,
         String name,
         double totalPrice,
         String imageUrl
 ) {
 
-    /// 정적 팩토리 메서드
-    public static CustomKeyboardWithName of(CustomKeyboard keyboard, Product housingProduct, Product switchProduct, Product keyCapProduct) {
+    public static CustomKeyboardWithName of(
+            CustomKeyboard keyboard,
+            Product housingProduct,
+            Product switchProduct,
+            Product keyCapProduct,
+            Product accessoryProduct) {
 
+        // accessoryProduct가 null이면 가격에 더하지 않음
         double totalPrice = housingProduct.getPrice() + switchProduct.getPrice() + keyCapProduct.getPrice();
+        if (accessoryProduct != null) {
+            totalPrice += accessoryProduct.getPrice();
+        }
 
         return CustomKeyboardWithName.builder()
                 .id(keyboard.getId())
@@ -55,6 +65,8 @@ public static CustomKeyboardWithName of(CustomKeyboard keyboard, Product housing
                 .switchName(switchProduct.getName())
                 .keyCapId(keyCapProduct.getId())
                 .keyCapName(keyCapProduct.getName())
+                .accessoryId(accessoryProduct != null ? accessoryProduct.getId() : null)
+                .accessoryName(accessoryProduct != null ? accessoryProduct.getName() : null)
                 .name(keyboard.getName())
                 .totalPrice(totalPrice)
                 .imageUrl(keyboard.getImageUrl())
diff --git a/src/main/java/site/kikihi/custom/platform/domain/product/Product.java b/src/main/java/site/kikihi/custom/platform/domain/product/Product.java
index f32470f..3346c28 100644
--- a/src/main/java/site/kikihi/custom/platform/domain/product/Product.java
+++ b/src/main/java/site/kikihi/custom/platform/domain/product/Product.java
@@ -25,6 +25,8 @@ public class Product {
 
     private String thumbnail; //
 
+    private String mapping;
+
     private String manufacturer; //
 
     private String detailPageUrl; //