During her husband's business trip, Mio receives an unexpected motorcycle delivery at her home. Inside the box is an anal vibrator, seemingly sent as a prank by someone. Mio desperately tries to fend off the man responsible, but ultimately gets captured by him. Her massive breasts are assaulted and her explosive ass runs wild in the worst possible scenario. This film depicts Mio's tragic ordeal as she becomes a victim of a cruel prank.