風紀委員腕章と水着は同じレイヤーで作っていたので腕章を外すと必然的に水着も
腕章外したら風紀乱しても仕方ないですよね？ｗ

The public morals armband and the swimsuit were made on the same layer, so removing the armband would inevitably result in removing the swimsuit as well.
If you remove the armband, you can't help but disturb the public morals, now can you? lol