diff --git a/server/messenger_backend/models/conversation.py b/server/messenger_backend/models/conversation.py
index 17d5b05..58a4531 100644
--- a/server/messenger_backend/models/conversation.py
+++ b/server/messenger_backend/models/conversation.py
@@ -1,28 +1,18 @@
 from django.db import models
-from django.db.models import Q
 
 from . import utils
 from .user import User
 
 
 class Conversation(utils.CustomModel):
-
-    user1 = models.ForeignKey(
-        User, on_delete=models.CASCADE, db_column="user1Id", related_name="+"
-    )
-    user2 = models.ForeignKey(
-        User, on_delete=models.CASCADE, db_column="user2Id", related_name="+", 
-    )
+    users = models.ManyToManyField(User)
     createdAt = models.DateTimeField(auto_now_add=True, db_index=True)
     updatedAt = models.DateTimeField(auto_now=True)
 
-    # find conversation given two user Ids
-    def find_conversation(user1Id, user2Id):
+    # find conversation given user Ids
+    def find_conversation(userIds):
         # return conversation or None if it doesn't exist
         try:
-            return Conversation.objects.get(
-                (Q(user1__id=user1Id) | Q(user1__id=user2Id)),
-                (Q(user2__id=user1Id) | Q(user2__id=user2Id)),
-            )
+            return Conversation.objects.get(users__exact=userIds)
         except Conversation.DoesNotExist:
             return None
diff --git a/server/messenger_backend/models/message.py b/server/messenger_backend/models/message.py
index ba3082a..9aa30d5 100644
--- a/server/messenger_backend/models/message.py
+++ b/server/messenger_backend/models/message.py
@@ -2,6 +2,7 @@
 
 from . import utils
 from .conversation import Conversation
+from .user import User
 
 
 class Message(utils.CustomModel):
@@ -14,5 +15,6 @@ class Message(utils.CustomModel):
         related_name="messages",
         related_query_name="message"
     )
+    readByUsers = models.ManyToMany(User, through='Reads')
     createdAt = models.DateTimeField(auto_now_add=True, db_index=True)
     updatedAt = models.DateTimeField(auto_now=True)
\ No newline at end of file
diff --git a/server/messenger_backend/models/read.py b/server/messenger_backend/models/read.py
new file mode 100644
index 0000000..13bb72f
--- /dev/null
+++ b/server/messenger_backend/models/read.py
@@ -0,0 +1,11 @@
+from django.db import models
+
+from . import utils
+from .message import Message
+from .user import User
+
+
+class Reads(utils.CustomModel):
+    message = models.ForeignKey(Message, on_delete=models.CASCADE)
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    readAt = models.DateTimeField(null=False)
\ No newline at end of file