diff --git a/ClanServer/Controllers/L44/Demodata.cs b/ClanServer/Controllers/L44/Demodata.cs
index 7ead366..2c9e350 100644
--- a/ClanServer/Controllers/L44/Demodata.cs
+++ b/ClanServer/Controllers/L44/Demodata.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
@@ -8,6 +8,7 @@ using Microsoft.AspNetCore.Mvc;
 using eAmuseCore.KBinXML;
 
 using ClanServer.Routing;
+using ClanServer.Data.L44;
 
 namespace ClanServer.Controllers.L44
 {
@@ -43,25 +44,15 @@ namespace ClanServer.Controllers.L44
         }
 
         [HttpPost, Route("8"), XrpcCall("demodata.get_hitchart")]
-        public ActionResult<EamuseXrpcData> GetHitchart([FromBody] EamuseXrpcData data)
+        public async Task<ActionResult<EamuseXrpcData>> GetHitchart([FromBody] EamuseXrpcData data)
         {
-            int[] hitChart = new int[]
-            {
-                70000110,
-                80000016,
-                60000080,
-                50000071,
-                60000115,
-                30000004,
-                70000079,
-                50000113,
-                80000086,
-                70000033
-            };
+            ClanMusicInfo mInfo = await ClanMusicInfo.Instance;
 
-            XElement orgElem = new XElement("hitchart_org", new XAttribute("count", hitChart.Length));
+            List<int> hitChart = mInfo.GetRandomSongs(10);
 
-            for (short i = 0; i < hitChart.Length; ++i)
+            XElement orgElem = new XElement("hitchart_org", new XAttribute("count", hitChart.Count));
+
+            for (short i = 0; i < hitChart.Count; ++i)
             {
                 orgElem.Add(new XElement("rankdata",
                     new KS32("music_id", hitChart[i]),
diff --git a/ClanServer/Controllers/L44/Gametop.cs b/ClanServer/Controllers/L44/Gametop.cs
index 49e30f0..50cbe60 100644
--- a/ClanServer/Controllers/L44/Gametop.cs
+++ b/ClanServer/Controllers/L44/Gametop.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
@@ -11,6 +11,7 @@ using eAmuseCore.KBinXML;
 using ClanServer.Routing;
 using ClanServer.Helpers;
 using ClanServer.Models;
+using ClanServer.Data.L44;
 
 namespace ClanServer.Controllers.L44
 {
@@ -350,22 +351,31 @@ namespace ClanServer.Controllers.L44
                 GenClanCourseList(),
                 new XElement("server"),
                 new XElement("rivallist"),
-                new XElement("fc_challenge",
-                    new XElement("today",
-                        new KS32("music_id", 40000057),
-                        new KU8("state", 0)
-                    ),
-                    new XElement("whim",
-                        new KS32("music_id", 30000041),
-                        new KU8("state", 80)
-                    )
-                ),
+                await GenFcChallenge(),
                 new XElement("navi",
                     new KU64("flag", freshProfile ? 0UL : 122UL)
                 )
             );
         }
 
+        private async Task<XElement> GenFcChallenge()
+        {
+            ClanMusicInfo mInfo = await ClanMusicInfo.Instance;
+
+            List<int> songs = mInfo.GetRandomSongs(2);
+
+            return new XElement("fc_challenge",
+                new XElement("today",
+                    new KS32("music_id", songs[0]),
+                    new KU8("state", 0)
+                ),
+                new XElement("whim",
+                    new KS32("music_id", songs[1]),
+                    new KU8("state", 80)
+                )
+            );
+        }
+
         private XElement GenJubilityTargetMusicList(JubeatProfile profile)
         {
             XElement res = new XElement("target_music_list");
diff --git a/ClanServer/Controllers/L44/Recommend.cs b/ClanServer/Controllers/L44/Recommend.cs
index 6eeb95c..33d9738 100644
--- a/ClanServer/Controllers/L44/Recommend.cs
+++ b/ClanServer/Controllers/L44/Recommend.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
@@ -8,6 +8,7 @@ using Microsoft.AspNetCore.Mvc;
 using eAmuseCore.KBinXML;
 
 using ClanServer.Routing;
+using ClanServer.Data.L44;
 
 namespace ClanServer.Controllers.L44
 {
@@ -15,33 +16,24 @@ namespace ClanServer.Controllers.L44
     public class RecommendController : ControllerBase
     {
         [HttpPost, Route("8"), XrpcCall("recommend.get_recommend")]
-        public ActionResult<EamuseXrpcData> GetRecommend([FromBody] EamuseXrpcData data)
+        public async Task<ActionResult<EamuseXrpcData>> GetRecommend([FromBody] EamuseXrpcData data)
         {
             XElement recommend = data.Document.Element("call").Element("recommend");
             XElement player = recommend.Element("data").Element("player");
             _ = int.Parse(player.Element("jid").Value);
 
-            int[] recommendedMusic = new int[]
-            {
-                80000016,
-                60000080,
-                50000113,
-                70000110,
-                80000126,
-                60000115,
-                80000050,
-                80000086,
-                30000048,
-                70000079
-            };
+            ClanMusicInfo mInfo = await ClanMusicInfo.Instance;
+
+            List<int> recommendedMusic = mInfo.GetRandomSongs(10);
+            Random rng = new Random();
 
             XElement musicList = new XElement("music_list");
 
-            for (int i = 0; i < recommendedMusic.Length; ++i)
+            for (int i = 0; i < recommendedMusic.Count; ++i)
             {
                 musicList.Add(new XElement("music", new XAttribute("order", i),
                     new KS32("music_id", recommendedMusic[i]),
-                    new KS8("seq", 0)
+                    new KS8("seq", (sbyte)rng.Next(3))
                 ));
             }
 
diff --git a/ClanServer/Data/L44/ClanMusicInfo.cs b/ClanServer/Data/L44/ClanMusicInfo.cs
index 9d7e198..7f61bd6 100644
--- a/ClanServer/Data/L44/ClanMusicInfo.cs
+++ b/ClanServer/Data/L44/ClanMusicInfo.cs
@@ -73,10 +73,9 @@ namespace ClanServer.Data.L44
         {
             HashSet<int> candidateIndexes = new HashSet<int>();
             while (candidateIndexes.Count < num)
-                candidateIndexes.Add(rng.Next(0, musicIdList.Count));
+                candidateIndexes.Add(rng.Next(musicIdList.Count));
 
-            List<int> result = new List<int>(num);
-            result.AddRange(candidateIndexes.Select(i => musicIdList[i]));
+            List<int> result = candidateIndexes.Select(i => musicIdList[i]).ToList();
 
             for (int i = result.Count - 1; i > 0; --i)
             {