Tanaka Mikio has been obsessed with girls whose age is far below him. Be it real life or 2D girls. Having been a virgin all his life, he decided to quit. He wanted to get married and establish a family. In the process, however, Tanaka got rejected 108 times.
Afterward, he meets Enomiya Mai, a lady who can cure his recurrent heartbreaks. Unfortunately, despite Tanaka's genuine affection for her, Mai can't sexually arouse him. Still, he decides to marry her anyway.
However, destiny does dirty on him; Enomiya Mai has two lovely daughters.