Leaving a door unlocked with 〜っぱなし
Grammar Explanation: Leaving something as-is with 〜っぱなし
 Blue tries to sneak into Masaki’s cottage, but the door is locked.
- ブルー:
 - 「開けっぱなし…なわけないか。まあいいわ。」
 - “There's no way it'd be left unlocked. Well, that's fine.”
 
Grammar Explanation: Leaving something as-is with 〜っぱなし
 Blue tries to sneak into Masaki’s cottage, but the door is locked.