During a company trip to a hot spring town, he planned to spend quality time with his wife, but after getting scolded in a phone call, he heads to a nearby snack bar to lift his spirits. There, he meets a goddess-like mama with incredible breasts who gets him completely drunk. After losing consciousness, he succumbs to her tongue-kiss seduction. Though both resist at first due to being married, they can't withstand the temptation, and a forbidden double affair begins. Over several days, he becomes utterly addicted to the mama's expert skills and her wild, creampie-filled sex, losing himself completely in this secret, passionate affair.