diff --git a/build.rs b/build.rs
index ec3f3ca..035daaa 100644
--- a/build.rs
+++ b/build.rs
@@ -70,6 +70,8 @@ static TARGETS: Lazy<HashMap<&str, Vec<&str>>> = Lazy::new(|| {
       "./proto/ss/domain/site.proto",
       "./proto/ss/member/identity.proto",
       "./proto/ss/member/member.proto",
+      "./proto/ss/member/member_class.proto",
+      "./proto/ss/member/member_level.proto",
       "./proto/ss/account/bank.proto",
     ],
   );
diff --git a/proto/c2se/backend/member_class.proto b/proto/c2se/backend/member_class.proto
index 14684d4..3e02466 100644
--- a/proto/c2se/backend/member_class.proto
+++ b/proto/c2se/backend/member_class.proto
@@ -29,7 +29,7 @@ message ListMemberClassesRequest {
   optional bet.protobuf.pagination.Pagination pagination = 1;
   repeated bet.protobuf.pagination.Search searches = 2;
   repeated bet.protobuf.pagination.Sort sorts = 3;
-  optional string name_like = 8;
+  optional string name_like = 4;
 }
 
 message ListMemberClasssResponse {
diff --git a/proto/c2se/backend/member_level.proto b/proto/c2se/backend/member_level.proto
index 12946de..2398d51 100644
--- a/proto/c2se/backend/member_level.proto
+++ b/proto/c2se/backend/member_level.proto
@@ -12,8 +12,8 @@ import "models/member/member_level.proto";
 
 // subject = bet.beteran.c2se.backend.member_level.CreateMemberLevel
 message CreateMemberLevelRequest {
-  string name = 2;
-  uint32 sort_order = 3;
+  string name = 1;
+  uint32 sort_order = 2;
 }
 
 message CreateMemberLevelResponse {
@@ -29,7 +29,7 @@ message ListMemberLevelesRequest {
   optional bet.protobuf.pagination.Pagination pagination = 1;
   repeated bet.protobuf.pagination.Search searches = 2;
   repeated bet.protobuf.pagination.Sort sorts = 3;
-  optional string name_like = 8;
+  optional string name_like = 4;
 }
 
 message ListMemberLevelsResponse {
diff --git a/proto/ss/member/member_class.proto b/proto/ss/member/member_class.proto
new file mode 100644
index 0000000..80e11a9
--- /dev/null
+++ b/proto/ss/member/member_class.proto
@@ -0,0 +1,88 @@
+syntax = "proto3";
+
+package bet.beteran.ss.member_class;
+
+import "protobuf/rpc/error.proto";
+import "protobuf/pagination/pagination.proto";
+import "protobuf/pagination/search.proto";
+import "protobuf/pagination/sort.proto";
+import "models/core/network.proto";
+
+import "models/member/member_class.proto";
+
+// subject = bet.beteran.ss.member_class.CreateMemberClass
+message CreateMemberClassRequest {
+  bet.beteran.core.network.Client client = 1;
+  optional string parent_id = 2;
+  string name = 3;
+}
+
+message CreateMemberClassResponse {
+  message Result {
+    bet.beteran.member.MemberClass member_class = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+// subject = bet.beteran.ss.member_class.ListMemberClasses
+message ListMemberClassesRequest {
+  bet.beteran.core.network.Client client = 1;
+  optional bet.protobuf.pagination.Pagination pagination = 2;
+  repeated bet.protobuf.pagination.Search searches = 3;
+  repeated bet.protobuf.pagination.Sort sorts = 4;
+  optional string name_like = 5;
+}
+
+message ListMemberClasssResponse {
+  message Result {
+    repeated bet.beteran.member.MemberClass member_classes = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+
+
+// subject = bet.beteran.ss.member_class.GetMemberClass
+message GetMemberClassRequest {
+  bet.beteran.core.network.Client client = 1;
+  string id = 2;
+}
+
+message GetMemberClassResponse {
+  message Result {
+    bet.beteran.member.MemberClass member_class = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+// subject = bet.beteran.ss.member_class.UpdateMemberClass
+message UpdateMemberClassRequest {
+  bet.beteran.core.network.Client client = 1;
+  string id = 2;
+  optional string parent_id = 3;
+  string name = 4;
+}
+
+message UpdateMemberClassResponse {
+  message Result {
+    bet.beteran.member.MemberClass member_class = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+// subject = bet.beteran.ss.member_class.DeleteMemberClass
+message DeleteMemberClassRequest {
+  bet.beteran.core.network.Client client = 1;
+  string id = 2;
+}
+
+message DeleteMemberClassResponse {
+  message Result {
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
diff --git a/proto/ss/member/member_level.proto b/proto/ss/member/member_level.proto
new file mode 100644
index 0000000..6f0e806
--- /dev/null
+++ b/proto/ss/member/member_level.proto
@@ -0,0 +1,89 @@
+syntax = "proto3";
+
+package bet.beteran.ss.member_level;
+
+import "protobuf/rpc/error.proto";
+import "protobuf/pagination/pagination.proto";
+import "protobuf/pagination/search.proto";
+import "protobuf/pagination/sort.proto";
+import "models/core/network.proto";
+
+import "models/member/member_level.proto";
+
+
+// subject = bet.beteran.ss.member_level.CreateMemberLevel
+message CreateMemberLevelRequest {
+  bet.beteran.core.network.Client client = 1;
+  string name = 2;
+  uint32 sort_order = 3;
+}
+
+message CreateMemberLevelResponse {
+  message Result {
+    bet.beteran.member.MemberLevel member_level = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+// subject = bet.beteran.ss.member_level.ListMemberLeveles
+message ListMemberLevelesRequest {
+  bet.beteran.core.network.Client client = 1;
+  optional bet.protobuf.pagination.Pagination pagination = 2;
+  repeated bet.protobuf.pagination.Search searches = 3;
+  repeated bet.protobuf.pagination.Sort sorts = 4;
+  optional string name_like = 5;
+}
+
+message ListMemberLevelsResponse {
+  message Result {
+    repeated bet.beteran.member.MemberLevel member_levels = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+
+
+// subject = bet.beteran.ss.member_level.GetMemberLevel
+message GetMemberLevelRequest {
+  bet.beteran.core.network.Client client = 1;
+  string id = 2;
+}
+
+message GetMemberLevelResponse {
+  message Result {
+    bet.beteran.member.MemberLevel member_level = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+// subject = bet.beteran.ss.member_level.UpdateMemberLevel
+message UpdateMemberLevelRequest {
+  bet.beteran.core.network.Client client = 1;
+  string id = 2;
+  optional string parent_id = 3;
+  string name = 4;
+}
+
+message UpdateMemberLevelResponse {
+  message Result {
+    bet.beteran.member.MemberLevel member_level = 1;
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}
+
+// subject = bet.beteran.ss.member_level.DeleteMemberLevel
+message DeleteMemberLevelRequest {
+  bet.beteran.core.network.Client client = 1;
+  string id = 2;
+}
+
+message DeleteMemberLevelResponse {
+  message Result {
+  }
+  optional bet.protobuf.rpc.Error error = 1;
+  optional Result result = 2;
+}