Little Miss Serious, Miko, is a popular and studious girl at school. As a member of the Morals Committee, she spends her days alongside her boyfriend, Seiichi, keeping things clean and orderly. One day while out and about, she happens upon classmate Kenta, who has been causing trouble lately. Later that week, driven by her sense of justice, she pays him a visit at home where she discovers he's been living with a yakuza named Ishigami. Before she knows what's happening, they overpower her and lock her up, using her body however they please...
