"Yu", a married woman who unconsciously wears a floating bra. She is married and has no sex with her husband for the second year. A man from an air conditioner construction company is attacked by Yuu's nipples while he is working, and is vaginal cum shot. Even after that, she was pushed several times, but she drowned in the pleasure of SEX, and her adulterous relationship slurred... What awaits beyond the collapse of one couple...?