A perverted, sadistic man who investigates and records the sexual organs of various girls. This time, his target is a black-haired, big-breasted beauty named Mikuchan. Although she should be asleep, her vagina is secreting strings of fluid. Even after she wakes up, he continues his actions without regard for her feelings. Despite Mikuchan's reluctance and apparent enjoyment, he chokes her and has sex with her, ejaculating inside.
