Yaoi where the story revolves around the seme or uke being horny all the time so his partner can't barely keep up
My Suha
http://www.mangago.zone/read-manga/yoru_to_asa_no_uta_ec/ (has a prequel)
Yaoi where the story revolves around the seme or uke being horny all the time so his partner can't barely keep up