Boku to Kare ga Kekkon ni Itatta Riyuu

One day when same-sex marriage was accepted, Mitsuya, who is gay, begins to think about marriage. Then he meets Takeharu, a classmate from junior high school, at the patisserie where he works, and is suddenly asked to take care of Takumi, his child. Takeharu says he is a single father and has no one else to turn to. He plans to stay with Takeharu for the night, but Takeharu's pushy attitude and Takumi's begging lead him to move in with him. Then, for some reason, Takeharu, who is straight, shows signs of wanting to marry Mitsuya. ......