diff --git a/Assets/VRM10/Editor/Components/Constraint/IVRM10ConstraintSourceDestinationExtensions.cs b/Assets/VRM10/Editor/Components/Constraint/IVRM10ConstraintSourceDestinationExtensions.cs
deleted file mode 100644
index 2fc95decd..000000000
--- a/Assets/VRM10/Editor/Components/Constraint/IVRM10ConstraintSourceDestinationExtensions.cs
+++ /dev/null
@@ -1,59 +0,0 @@
-using UnityEditor;
-using UnityEngine;
-
-namespace UniVRM10
-{
-    public static class VRM10PositionRotationConstraintBaseExtensions
-    {
-        public static void DrawSourceCoords(this VRM10RotationPositionConstraintBase self)
-        {
-            try
-            {
-                self.GetSourceCoords().Draw(0.2f);
-            }
-            catch (ConstraintException)
-            {
-
-            }
-        }
-        public static void DrawSourceCurrent(this VRM10RotationPositionConstraintBase self)
-        {
-            try
-            {
-                Handles.matrix = self.GetSourceCurrent().TRS(0.05f);
-                Handles.color = Color.yellow;
-                Handles.DrawWireCube(Vector3.zero, Vector3.one);
-            }
-            catch (ConstraintException)
-            {
-
-            }
-        }
-
-        public static void DrawDstCoords(this VRM10RotationPositionConstraintBase self)
-        {
-            try
-            {
-                self.GetDstCoords().Draw(0.2f);
-            }
-            catch (ConstraintException)
-            {
-
-            }
-        }
-
-        public static void DrawDstCurrent(this VRM10RotationPositionConstraintBase self)
-        {
-            try
-            {
-                Handles.matrix = self.GetDstCurrent().TRS(0.05f);
-                Handles.color = Color.yellow;
-                Handles.DrawWireCube(Vector3.zero, Vector3.one);
-            }
-            catch (ConstraintException)
-            {
-
-            }
-        }
-    }
-}
diff --git a/Assets/VRM10/Editor/Components/Constraint/IVRM10ConstraintSourceDestinationExtensions.cs.meta b/Assets/VRM10/Editor/Components/Constraint/IVRM10ConstraintSourceDestinationExtensions.cs.meta
deleted file mode 100644
index a2836e116..000000000
--- a/Assets/VRM10/Editor/Components/Constraint/IVRM10ConstraintSourceDestinationExtensions.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 59e1ae1f9d4fb9a459cd2c97a4351b1f
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/VRM10/Editor/Components/Constraint/VRM10PostionRotationConstraintEditorBase.cs b/Assets/VRM10/Editor/Components/Constraint/VRM10PostionRotationConstraintEditorBase.cs
index 35b6f5f50..e058dfb73 100644
--- a/Assets/VRM10/Editor/Components/Constraint/VRM10PostionRotationConstraintEditorBase.cs
+++ b/Assets/VRM10/Editor/Components/Constraint/VRM10PostionRotationConstraintEditorBase.cs
@@ -104,10 +104,21 @@ namespace UniVRM10
                 Handles.Label(m_target.GetComponent().transform.position, sb.ToString(), Style);
             }
 
-            m_target.DrawSourceCoords();
-            m_target.DrawSourceCurrent();
-            m_target.DrawDstCoords();
-            m_target.DrawDstCurrent();
+            m_target.GetSourceCoords().Draw(0.2f);
+            if (Application.isPlaying)
+            {
+                Handles.matrix = m_target.GetSourceCurrent().TRS(0.05f);
+                Handles.color = Color.yellow;
+                Handles.DrawWireCube(Vector3.zero, Vector3.one);
+            }
+
+            m_target.GetDstCoords().Draw(0.2f);
+            if (Application.isPlaying)
+            {
+                Handles.matrix = m_target.GetDstCurrent().TRS(0.05f);
+                Handles.color = Color.yellow;
+                Handles.DrawWireCube(Vector3.zero, Vector3.one);
+            }
         }
     }
 }