While his mother is away on a trip, Daisuke begins living alone with his mother's best friend, Asuna. Daisuke is at a loss as to what to do when a busty beauty suddenly appears. To be honest, Asuna is exactly the type of woman Daisuke likes (older, busty). He wants to have a relationship with her somehow, but it's too much for Daisuke, who is shy around women. In the end, in a fit of desperation, he forces himself to peek into her bathroom. But because he was too nervous, he is immediately found out... instead of getting angry, Asuna seduces him with her ample breasts...