Issei Shimoyama, a 25-year-old office worker who longs for an ordinary family but suffers from ED. One day, when he was drunk at entertainment and crouched on the street, he was helped by a handsome host.

He was Ayato Hayase, a classmate of Ichisei's junior high school! When I woke up the next morning, I saw a child who looked just like Saito in front of me.

Ayato was raising his 4-year-old brother Sora alone while making a living as a host.

Issei, who is also attached to the adorable sky and can't leave the two of them alone, has often visited Saito's house since then, but gradually special feelings sprouted ...?