When the number of case of purse-snatching increases around the school, an anti-crime committee is set up, and former 3B students volunteer to do night patrols. Meanwhile, Kosaku is finally moved out of isolation.
最近多発しているひったくり対策のため夜回りが始まることに。儀（斉藤祥太）はバイクで暴走行為や引ったくりを繰り返している兄・武（白川峻）に止めるよう懇願するが…。
