On her way home from school, small-breasted Shizuku is suddenly abducted by a man. Before she realizes what's happening, she's tied up by a stranger, forced into lewd acts, and raped. As the days of confinement and training continue, Shizuku's mind slowly begins to change. Her petite body awakens to pleasure, and she starts craving the man's cock and cum, transforming into a depraved girl.