Through the actions of men, the girls' pure youth gradually becomes distorted. Their path is filled with inescapable pranks and lewd games—while their bodies resist, their instincts begin craving pleasure. 1. Seeking advice from male club members to improve her skills, a girl finds herself subjected to nothing but vulgar training, beginning days of bodily manipulation. 2. While practicing alone after school, her boyfriend appears, leading to humiliating play in the secluded gymnasium. 3. Caught masturbating with a shinai at the dojo, she's discovered by male club members who freely torment her as they please. In the midst of it all, her body slowly falls under their control.