diff --git a/Assets/ResourcesData/Background/[공용]학교 옥상/Glb/[공용]학교 옥상.glb b/Assets/ResourcesData/Background/[공용]학교 옥상/Glb/[공용]학교 옥상.glb
index c39312fac..11a854508 100644
--- a/Assets/ResourcesData/Background/[공용]학교 옥상/Glb/[공용]학교 옥상.glb	
+++ b/Assets/ResourcesData/Background/[공용]학교 옥상/Glb/[공용]학교 옥상.glb	
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:cd644b9599f103c827f583175fbd87b6e064a331921008bce9b021e80afdc48f
-size 77775084
+oid sha256:63e6812c81f1ded19edbfe5addf7342ab6ce6ed23a7dd5e626e4bd01938f3c2f
+size 78015360
diff --git a/Assets/ResourcesData/Background/[공용]학교 옥상/Scene/[공용]학교 옥상.unity b/Assets/ResourcesData/Background/[공용]학교 옥상/Scene/[공용]학교 옥상.unity
index 3d89b686d..031a9362c 100644
--- a/Assets/ResourcesData/Background/[공용]학교 옥상/Scene/[공용]학교 옥상.unity	
+++ b/Assets/ResourcesData/Background/[공용]학교 옥상/Scene/[공용]학교 옥상.unity	
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:26cb3135b174b2dc7c79fc8f10ed3c7ee77a72d2cceaf4462d43ea8bffd65dbf
-size 198180
+oid sha256:b033611b0fd98ea0f6e834c5186c7b2ff604d57de3881bb4abca152f67f2bc26
+size 208822
diff --git a/Assets/Scripts/WefLab/WefLabWebSocketClient.cs b/Assets/Scripts/WefLab/WefLabWebSocketClient.cs
index 9519885cd..c1f0fd3d4 100644
--- a/Assets/Scripts/WefLab/WefLabWebSocketClient.cs
+++ b/Assets/Scripts/WefLab/WefLabWebSocketClient.cs
@@ -998,7 +998,7 @@ namespace WefLab
                     return rawValue * 100;   // 1 balloon / gem = 100 KRW
 
                 case "twitch":
-                    return rawValue / 10;    // bits ??KRW (approx; currency.real preferred)
+                    return rawValue / 10;    // bits -> KRW (approx; currency.real preferred)
 
                 case "naver":   // chzzk cheese
                 case "chzzk":
@@ -1050,7 +1050,7 @@ namespace WefLab
                 timestamp = timestamp
             };
 
-            Debug.Log($"[WefLab] DONATION ({platform}/{subtype}): {donorName} | raw {rawValue} ??{amount} KRW | {message}");
+            Debug.Log($"[WefLab] DONATION ({platform}/{subtype}): {donorName} | raw {rawValue} -> {amount} KRW | {message}");
 
             EnqueueDonation(donation);
         }