From Good Girls Scan BL:

Childhood friends, Kagetora and Haruta, are a super lovey-dovey high-school couple! After finally going steady with Haruta, who he has always liked, Kagetora is on cloud nine!!! ... Or he should be, but for some reason, he keeps desperately avoiding all of Haruta’s "invitations". The reason is because Kagetora’s *beep* is *beep*?!

It’s the battle of love between an offensive uke who wants to become one with the one he loves, and a defensive seme who doesn’t want to lay hands on the one he loves!