第 15 集: 少女們在前往偏遠島嶼的郵輪之旅中，調查神秘的泳衣失竊事件。

15

The episode kicks off with the girls boarding a cruise, courtesy of the TV network, under the pretense of taking Ranga to a party on a remote island. Ushio is chatting with her two friends about their bikinis when she realizes hers has mysteriously gone missing. The rest of the episode follows the girls as they investigate who is stealing their swimsuits.