Responses
maybe http://www.mangago.zone/read-manga/kagakushitsu_e_douzo/ the story of the MC's brother and best friend
sorry..just realized you said uke is forgetful..it's the seme that forget things in the link I gave you..so that one's wrong..
I'm looking for a yaoi (one shot I think) about an uke who is really forgetful. He doesn't remember things he is not interested in like kanji or the way to the classroom. One day he and the seme kissed but he acted like he did not remember, out of embarrassment so the seme thinks he is not interested in him. Thus seme avoids/starts to pull away from uke.