On her first day off in a while, Mio visits a man's house for the first time. Usually, they meet secretly at hotels because his wife is always home. However, the man is actually married. Though nervous about whether the wife might return, Mio comes over anyway. The wife had gone back to her parents' home for childbirth, so she wouldn't be home that day. The two relax together in the living room, gradually growing affectionate, gazing into each other's eyes, and sharing a kiss. The man starts groping and licking Mio's big tits, turning her on. Embarrassed yet aroused, Mio suggests going to bed. The man surprises her with lingerie he bought just for this occasion. Shyly changing into it, Mio enters the bedroom. The man is excited, but Mio grows jealous seeing the married couple's bedroom—the double bed and matching pillows. She rubs her scent onto the wife's pillow. Gradually, the two start making out on the bed. The man passionately gropes and licks Mio's large breasts. Unable to hold back, he receives a blowjob from her. As his arousal peaks, he wants full intercourse, but Mio teases him with handjob and titty fuck, smiling as she brings him close to climax. The taboo thrill of having sex in a married couple's bed flips a switch in Mio, and she begins passionately demanding more sex. Responding in kind, the man thrusts into her harder and deeper...