24-year-old Yuka works secretly as a nude model behind her husband's back, hiding her own desires while living day to day. Today, she has a sketching session with a male model. During the drawing session, she can see the male model's huge cock up close, making her heart race with excitement. After the shoot ends and she returns to the changing room, she can no longer suppress her feelings as her body grows hot. Even though the male model is right on the other side of the room divider, she begins masturbating quietly, holding her breath. How will these desires manifest themselves?