diff --git a/market/admin.py b/market/admin.py
index 5f16242..bb224ea 100644
--- a/market/admin.py
+++ b/market/admin.py
@@ -1,11 +1,10 @@
 from django.contrib import admin
 
-from .models import Brand, Product, ProductColor, ProductStorage, Post, Image
+from .models import Brand, Product, ProductStorage, Post, Image
 
 
 admin.site.register(Brand)
 admin.site.register(Product)
-admin.site.register(ProductColor)
 admin.site.register(ProductStorage)
 admin.site.register(Image)
 
@@ -25,5 +24,4 @@ class PostAdmin(admin.ModelAdmin):
     list_filter = ("status", "written_at")
     search_fields = ("product", "text")
     date_hierarchy = "written_at"
-    ordering = ("status", "written_at")
     raw_id_fields = ("author",)
diff --git a/market/models.py b/market/models.py
index c2dcacd..a94773b 100644
--- a/market/models.py
+++ b/market/models.py
@@ -5,19 +5,11 @@ from user.models import User
 
 class Brand(models.Model):
     name = models.CharField(max_length=20)
-    image = models.ImageField(upload_to="brands", blank=True, null=True)
 
     def __str__(self):
         return self.name
 
 
-class ProductColor(models.Model):
-    color = models.CharField(max_length=20)
-
-    def __str__(self):
-        return self.color
-
-
 class ProductStorage(models.Model):
     storage = models.CharField(max_length=20)
 
@@ -30,14 +22,14 @@ class Product(models.Model):
     brand = models.ForeignKey(
         Brand, on_delete=models.CASCADE, related_name="products"
     )
-    color = models.ManyToManyField(
-        "ProductColor", blank=True, related_name="products"
-    )
     storage = models.ManyToManyField(
         "ProductStorage", blank=True, related_name="products"
     )
     release_date = models.DateField(blank=True, null=True)
 
+    class Meta:
+        ordering = ["-release_date"]
+
     def __str__(self):
         return self.name
 
@@ -51,7 +43,7 @@ class Post(models.Model):
     product = models.ForeignKey(
         Product, on_delete=models.CASCADE, related_name="posts"
     )
-    color = models.ForeignKey(ProductColor, on_delete=models.CASCADE)
+    color = models.CharField(max_length=20)
     storage = models.ForeignKey(ProductStorage, on_delete=models.CASCADE)
     price = models.IntegerField()
     text = models.TextField()
@@ -61,6 +53,9 @@ class Post(models.Model):
     )
     written_at = models.DateTimeField(auto_now_add=True)
 
+    class Meta:
+        ordering = ["-written_at"]
+
     def __str__(self):
         return self.product.name
 
diff --git a/market/serializers.py b/market/serializers.py
index 84d35c9..f0dbfb7 100644
--- a/market/serializers.py
+++ b/market/serializers.py
@@ -4,7 +4,6 @@ from rest_framework.serializers import ModelSerializer
 from market.models import (
     Brand,
     Product,
-    ProductColor,
     ProductStorage,
     Post,
     Image,
@@ -17,12 +16,6 @@ class BrandSerializer(ModelSerializer):
         fields = "__all__"
 
 
-class ProductColorSerializer(ModelSerializer):
-    class Meta:
-        model = ProductColor
-        fields = ("color",)
-
-
 class ProductStorageSerializer(ModelSerializer):
     class Meta:
         model = ProductStorage
@@ -30,12 +23,11 @@ class ProductStorageSerializer(ModelSerializer):
 
 
 class ProductSerializer(ModelSerializer):
-    color = ProductColorSerializer(many=True, read_only=True)
     storage = ProductStorageSerializer(many=True, read_only=True)
 
     class Meta:
         model = Product
-        fields = ("id", "name", "brand", "color", "storage")
+        fields = ("id", "name", "brand", "storage")
 
 
 class ProductListSerializer(ModelSerializer):
@@ -56,7 +48,7 @@ class PostSerializer(ModelSerializer):
     product = ProductListSerializer(read_only=True)
     nickname = serializers.CharField(source="author.nickname")
     images = ImageSerializer(many=True, read_only=True)
-    storage = serializers.CharField(source="storage.storage")
+    # storage = serializers.CharField(source="storage.storage")
 
     class Meta:
         model = Post
@@ -64,7 +56,7 @@ class PostSerializer(ModelSerializer):
             "id",
             "product",
             "color",
-            "storage",
+            "storage__storage",
             "price",
             "text",
             "nickname",
diff --git a/market/viewsets.py b/market/viewsets.py
index 97d0667..710cedc 100644
--- a/market/viewsets.py
+++ b/market/viewsets.py
@@ -24,8 +24,8 @@ class BrandViewset(ActionBasedMixin, ModelViewSet):
 
     @action(detail=True, methods=["GET"])
     def product(self, request, pk):
-        brand = self.get_object()
-        serializer = self.get_serializer(brand.products.all(), many=True)
+        queryset = self.get_object().products.all()
+        serializer = self.get_serializer(queryset, many=True)
         return Response(serializer.data)
 
 
diff --git a/user/models.py b/user/models.py
index 2a24691..8deebd9 100644
--- a/user/models.py
+++ b/user/models.py
@@ -3,7 +3,7 @@ from django.db import models
 
 
 class User(AbstractUser):
-    nickname = models.CharField(max_length=50)
+    nickname = models.CharField(max_length=10)
 
     # remove unnecessary fields
     first_name = None