diff --git a/src/composables/dateOpt.ts b/src/composables/dateOpt.ts
index 5e850d7..a71ec4f 100644
--- a/src/composables/dateOpt.ts
+++ b/src/composables/dateOpt.ts
@@ -27,6 +27,7 @@ function _useOptions() {
     }
     if (options.castDayNo >= 29) {
       setTargetDate(castBeginDate.value!.add({ days: 1 }))
+      castTargetDate.value = castBeginDate.value!.add({ days: 1 })
     }
     else {
       setTargetDate(castTargetDate.value!.add({ days: 1 }))