Ikezu Kareshi no Otoshikata
Complete | Sakyou Aya , SAKYO Aya | 2000 released
Darenimo Naisho de.
Complete | SAKURA Riko | 2013 released
1. Guy finds out the popular kid is a virgin and blackmails him into dating. Could have been super cute if it didn't turn into "You are an uke now. You can never be with a girl or put it in a guy." but of course the seme can be bi because he's still a guy. 2. Relatives maybe, the backstory is vague, but younger uke and older seme who live together but haven't had sex. older one is a bl manga artist
Joushi Tono Hitoban