He does not want a girlfriend, but he does want loving sex and romantic dates without commitment. Machi is his perfectly convenient match: whenever they have time, they seek each other out and have raw sex with creampies. They have never agreed to date, and he still sleeps with other women, yet he likes her enough to hate the thought of her cheating. Whenever they meet, they act like lovers and have affectionate unprotected sex. Is she a friend with benefits—or his girlfriend?