Ichika, a female college student, has a manly personality and her club is a motorcycle club, so there are only men around her, but the men around her have not yet noticed that she is actually a slut with extremely erotic big breasts. One day, a friend who went into Ichika's room to use the toilet was fixated on Ichika's big breasts as she relaxed in a see-through loungewear, and Ichika flipped her clothes...