Mikio returns to visit his cousin Chitose, who has become the "young hostess" of a local hostel. While Chitose harbors deep feelings for Mikio, her reunion is complicated by the arrival of the provocative Mao. Using a scandalous swimsuit photoshoot as leverage, Mao subjects Chitose to sexual manipulation and coercion, forcing the conflicted girl into a secret, shameful relationship while Mikio is staying nearby.