diff --git a/Assets/Scripts/Mechanics/PlatformDropThrough.cs b/Assets/Scripts/Mechanics/PlatformDropThrough.cs
index a63836f..8765b3c 100644
--- a/Assets/Scripts/Mechanics/PlatformDropThrough.cs
+++ b/Assets/Scripts/Mechanics/PlatformDropThrough.cs
@@ -26,19 +26,31 @@ namespace Platformer.Mechanics
             _self = GetComponent<Collider2D>();
             _ko = GetComponent<KinematicObject>();
             _jumpThroughMask = 1 << JUMP_THROUGH_LAYER;
+            Debug.Log($"[BT32-DropThrough] Awake — self={(_self != null ? "OK" : "NULL")} ko={(_ko != null ? "OK" : "NULL")} mask={_jumpThroughMask}");
         }
 
         void Start()
         {
-            // BT5-Dev #31 — 게임 시작 시 즉시 raycast 1회 → Player 시작 위치가 발판 위면 즉시 충돌 활성 (떨어짐 차단)
+            Debug.Log($"[BT32-DropThrough] Start called");
             if (_self == null) return;
             Vector2 footPos = new Vector2(_self.bounds.center.x, _self.bounds.min.y + 0.02f);
-            RaycastHit2D startHit = Physics2D.Raycast(footPos, Vector2.down, footRayDistance, _jumpThroughMask);
+            // BT32 — 거리 무한대 = Player 시작 위치 영역 발판 영역 영역 식별
+            RaycastHit2D startHit = Physics2D.Raycast(footPos, Vector2.down, Mathf.Infinity, _jumpThroughMask);
             if (startHit.collider != null)
             {
                 Physics2D.IgnoreCollision(_self, startHit.collider, false);
                 _activePlatform = startHit.collider;
-                Debug.Log($"[BT31-StartHit] Player 시작 위치 발판 영역 충돌 활성: {startHit.collider.gameObject.name}");
+                Debug.Log($"[BT32-StartHit] dist={startHit.distance:F2} platform='{startHit.collider.gameObject.name}' layer={startHit.collider.gameObject.layer}");
+            }
+            else
+            {
+                Debug.Log($"[BT32-StartHit] no Layer 8 platform below footPos={footPos} (mask={_jumpThroughMask})");
+                // 마지막 수단 — 모든 Layer raycast해서 가장 가까운 영역 식별
+                RaycastHit2D anyHit = Physics2D.Raycast(footPos, Vector2.down, Mathf.Infinity);
+                if (anyHit.collider != null)
+                    Debug.Log($"[BT32-AnyHit] anyLayer dist={anyHit.distance:F2} platform='{anyHit.collider.gameObject.name}' layer={anyHit.collider.gameObject.layer}");
+                else
+                    Debug.Log($"[BT32-AnyHit] NOTHING below player");
             }
         }