Ao is a well-known otaku among his peers. He and his classmates discuss otaku topics daily, and as a result, he's never had a girlfriend. Perhaps due to his behavior, his classmates refer to him as "Otaku Boy" instead of his name, which makes him feel isolated, especially by Hanami.

However, Ao also has a dream, to find a good partner and start a family. In school, there's a club that aims to make that dream come true: The Conception and Motherhood Activities Club, also known as the "Procreation Club." This is an official school activity supported by the government that promotes pregnancy and family planning among students.

After a selection process, Ao manages to join the club. According to his advisor, there's a girl who wants to become his partner. But when Sudou enters the club room and sees that girl, he's stunned. She is Hanami, the same girl who had been cold towards him until now.