Aoi joins the Fertility and Childbirth Club to fulfill his dream of starting a family and enters a trial week to choose between Umi and Aika. As they take turns sharing intimate days and nights with him, their sexual encounters deepen into genuine affection. Aoi is overwhelmed by his desire to please both women, cherishing their passionate embraces and heartfelt confessions, yet tormented by the impending choice that will inevitably break one heart.