Kanojo ga Suki na Mono wa Homo de Atte Boku dewa Nai

Jun Andou is a high school boy who spends his days hiding that he's homosexual. One day, Jun witnesses his classmate, Sae Miura, buying a BL book at a bookstore. That encounter forces their relationship towards a new direction.

"I want to like the opposite sex, even have my own child. I want to have my very own family. I desire to have that 'ordinary' happiness. The problem is, I can't get it up to women."

(Source: Kadokawa, translated)