Kenta can't focus on his exam studies due to his constantly arguing parents. As a result, he's sent to stay with his aunt Saki during summer break. Saki has always been someone he's admired, and he's thrilled at the chance to live with her. Her soft, voluptuous breasts are noticeable even through her clothes, stirring emotions within Kenta that make studying the last thing on his mind—he's completely preoccupied with spending time with her. Sensing his inner turmoil, Saki boldly suggests an unconventional way to help him relax. The warmth and excitement of this new dynamic begin to deeply affect Kenta's heart.