Mio, a married woman who has been sexless for a while, drops the underwear she bought to seduce her husband on the balcony below. When she reluctantly goes downstairs to get it, a vulgar old man says, "You're frustrated, aren't you? That's why you invited me out. I'm so glad..." and makes a big mistake! Mio is attacked at the front door. No! No! But the old man continues to thrust his cock into her, and the busty wife loses herself and becomes lewd after being creampied over and over again in a state where she's already cumming.