Child X Adult Equation (Yaoi Manga) Volume 1

Chiharu and Satoshi are childhood friends since preschool.
Raised as the only son of the Nanjou family, Chiharu was a crybaby. Satoshi on the other hand was a tough, rambunctious child who loved playing soccer more than anything else.
Nowadays Chiharu is popular with the girls, unlike Satoshi. But he has a secret crush that he can't let anyone know, especially Satoshi.
Watch as Chiharu's coming-of-age story unfolds, and how he gets his entire family involved.