Mei is a lewd young wife who has sex with her sex friend every day during the day. After her husband leaves for work, her lust is uncontrollable and her erotic switch turns on, causing her to masturbate. She pushes the delivery man down at the entrance, sniffs his smell, says "You smell like sweat," takes off his pants, and gives him a blowjob, making him cum. After that, she forces the salesman who came by into her room and begs for sex. The salesman is a sadist, and Mei becomes "obedient" and ends up getting creampied. At the end, her neighbor's sex friend joins in for an "unlimited threesome." She gets on all fours with a vibrator attached to a string and is toyed with, and her pussy is washed to wash away the sperm.