Ryuji, a college student around his age, can't get out of his mind Mr./Ms. Yukina, a married woman with plump busty breasts who lives next door. - She lives in agony every day while having various delusions with her plump boobs and buttocks. One day, Ryuji is asked by his mother to deliver something to Mr./Ms.'s house. - Yukina, who noticed that Ryuji's gaze was focused on her chest when she came to deliver it, provokes Ryuji with a gesture that rubs her chest! As it is, the two of them ...