This is a story about falling in love with a friend's younger 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!?

20yo virgin university student x 28yo host club manager
Devoted first loves that pass each other by intertwine in a sexy heart-pounding romcom ♪
中学の時からのツレ・日朝とホストクラブを経営している煌夜は、
日朝の弟・夕真が可愛くて仕方がない!
夕真が20歳になったら自分の恋人にすると決めていた煌夜だったが
最近、夕真となんだか距離を感じていて…!?
20歳の誕生日当日、夕真に男を紹介してほしいと言われてしまい大ショック!!!!
「お前のはじめてはオレに決まってるだろ」と夕真を押し倒すも
逆に童貞の夕真にめちゃくちゃ喘がされてしまい…!!!?
大好きな煌夜が自分の兄と付き合っていると思い込んでいる夕真は
ビッチと誤解をしたまま体を繋げるけれど、煌夜は実はハジメテで…!!?
両片想いのふたりの勘違いセックスの行方は!?

20歳童貞大学生×28歳ホストクラブ店長
すれ違う一途な初恋が絡み合う、エロキュンラブコメ♪