Unable to bear her husband's domestic violence and cheating, Eriko ran away to her sister's house.Her sister's husband, Taichi, met Eriko in place of her sister, who couldn't go home today because of work.After dinner, Taichi invites her to have a drink to cheer her up.After a while, she was relieved to see Eriko start laughing brightly, perhaps because she was drunk, but for a short time, after the party was over and Taichi was taking a bath, the incident was about to take place. ``I'll wash your back.'' Eriko, who actually gets naughty when she's drunk, came in naked.Eriko's hand reaches out to Taichi's crotch as she panics...