diff --git a/pon2.nimble b/pon2.nimble
index ac7f341..2545d12 100644
--- a/pon2.nimble
+++ b/pon2.nimble
@@ -1,6 +1,6 @@
 # Package
 
-version = "0.13.1"
+version = "0.13.2"
 author = "Keisuke Izumiya"
 description = "Puyo Puyo and Nazo Puyo Application"
 license = "Apache-2.0"
diff --git a/src/pon2pkg/private/app/simulator/common.nim b/src/pon2pkg/private/app/simulator/common.nim
index 5084c0e..938e113 100644
--- a/src/pon2pkg/private/app/simulator/common.nim
+++ b/src/pon2pkg/private/app/simulator/common.nim
@@ -119,7 +119,7 @@ func nextPairCell*(
 func immediateNextPairCell*(simulator: Simulator, axis: bool): Cell {.inline.} =
   ## Returns the next-pair's cell in the immediate pairs.
   simulator.nazoPuyoWrap.get:
-    let nextIdx = wrappedNazoPuyo.puyoPuyo.nextIndex
+    let nextIdx = wrappedNazoPuyo.puyoPuyo.nextIndex.succ
     if nextIdx >= wrappedNazoPuyo.puyoPuyo.pairsPositions.len:
       return Cell.None
 
@@ -129,7 +129,7 @@ func immediateNextPairCell*(simulator: Simulator, axis: bool): Cell {.inline.} =
 func immediateDoubleNextPairCell*(simulator: Simulator, axis: bool): Cell {.inline.} =
   ## Returns the double-next-pair's cell in the immediate pairs.
   simulator.nazoPuyoWrap.get:
-    let doubleNextIdx = wrappedNazoPuyo.puyoPuyo.nextIndex.succ
+    let doubleNextIdx = wrappedNazoPuyo.puyoPuyo.nextIndex.succ 2
     if doubleNextIdx >= wrappedNazoPuyo.puyoPuyo.pairsPositions.len:
       return Cell.None