Satoru instantly falls in love with the beautiful and sexy Yuka when his mother's best friend Yuka comes to stay. She shows off her attractive big breasts and can't help but drink her saliva. As his heartbeat continues to pound, Satoru becomes unable to stay still even if he is standing, and he impulsively peeks into Yuka's bathing form... He is immediately noticed by Yuka. However, instead of getting angry at her, Yuka invites Satoru straight into the bathroom and starts touching her body...