Responses
That situation sounds similar to this one - http://www.mangago.zone/read-manga/dramatic_maestro/
I believe you're referring to this one http://www.mangago.zone/read-manga/dramatic_maestro/ but the scanlation seemed to have been dropped.
lol I can't remember the name of a yaoi manga . The story goes like this, the uke saw the seme flirting with a girl (maybe uke's ex) and he got mad then slapped the seme. The seme said that the uke used his palm when slapped him and he thought the uke was cute. The next day, the seme found the uke in his class and kiss him.