Contains three stories of private erotic lessons by three innocent beautiful girls who look great in white school swimsuits. Chapter 1: Tsubomi of first love, seduces her private tutor. Chapter 2: Natsu, a childhood friend, gives him her precious "first time." Chapter 3: Hirono, the little sister who loves her big brother, gets cozy in the family pool. The bulges of their small breasts are throbbing with erotic anticipation.