Kazuya is excited and can't hide his joy when he finds out that Mayu, a woman he admires and a friend of his mother, is coming to visit him for the first time in a long time. And on the night they meet again, the two go out drinking together... In a drunken fit, she starts complaining about her relationship with her husband, and while he comforts her, they end up having sex. The two then seek each other's carnal desires to fill the loneliness, and enjoy a secret pleasure. However, Mayu is married and feels guilty about her husband, so she tries to distance herself from her husband...