diff --git a/RadishFrameworkLight/src/fight3D/Fight.java b/RadishFrameworkLight/src/fight3D/Fight.java
index f992208..9f10dd9 100644
--- a/RadishFrameworkLight/src/fight3D/Fight.java
+++ b/RadishFrameworkLight/src/fight3D/Fight.java
@@ -80,7 +80,7 @@
 		universe.placeAsAReceiver(stageGround);
 		RWTCanvas3D c = (RWTCanvas3D) fightListener;
 		s.setBackgroundSize(new Dimension(c.getWidth(), c.getHeight()));
-		universe.place(s.getBackground());
+		universe.placeUnremovable(s.getBackground());
 
 		// �L�����N�^�̒lj��A����̒lj�
 		for (int i = 0; i < selectedCharacterArray.length; i++) {