Yuta always lives with his mother because his father is always on a business trip abroad. He is preparing to take the most important exam of his life, the university entrance exam. His mother, wanting him to be successful like his father, always treats him strictly, forcing him to study constantly and forbidding him from going out or making friends until the university entrance exam is over. Kenichi is Yuta's best friend, the one who brings porn magazines and videos for Yuta to masturbate. They always have to secretly meet each other whenever Yuta's mother is away. One time, Kenichi brings Yuta a VR headset to watch some intense adult videos, but suddenly Yuta's mother returns. Kenichi quickly hides in the closet while Yuta is forced to attend an extra class by his mother. As soon as Kenichi leaves, Eri discovers a strange item under the bed. As she picks it up to look, she realizes it's an adult film that Yuta was watching. Longing for intimacy with her husband, seeing those incredibly realistic images, Eri can't help but masturbate in front of Kenichi. While in the heat of the moment, Eri accidentally touches something, and when she takes off her glasses, she discovers Kenichi! Seeing his huge penis and feeling overwhelmed by her uncontrollable sexual desires, she can no longer restrain herself! They engage in passionate lovemaking time after time, from morning till night, even having sex right next to Yuta until the next morning...