Give Me Your Little Brother.

Kouya, who runs a host club with his friend since middle school, Akitomo, can't help but think that Akitomo's younger brother, Yuuma, is cute! Kouya decided that Yuuma would be his boyfriend once he turned 20, but lately, Yuuma's been feeling distant...?! On the day of his 20th birthday, it was a huge shock for Yuuma to ask him to introduce him to a guy!!!! He pushes Yuuma down saying, "Your first is obviously going to be me," just to instead be messed up and left panting by the virgin Yuuma...!!!? Yuuma, mistakenly thinking that his beloved Kouya is a bitch dating his older brother, has sex with him, but it's actually Kouya's first time...?! The outcome of the misguided sex between two people with crushes on each other is?!