Since her school days, Sumire has been an avid reader of hardcore erotic ladies' comics, incorporating the masturbation techniques she learned from them into her daily life. She repeatedly indulges in fantasies of being violently overpowered and gang-raped by multiple men. Working part-time at a family restaurant, one Sunday after closing, she realizes she left her phone behind and returns to the store alone. As she unlocks the door and steps inside, she walks straight into a group of burglars who broke in to steal the weekend's cash receipts. The moment she realizes what's happening, Sumire is surrounded and helplessly overpowered.