So I can't remember the name of this yaoi manga and its been driving me nuts the past couple of days.
If I remember correctly, it was a sad but heart warming story. So it starts off with the protagonist being a guy who slept around (with other guys) a lot then he falls in love with this dude at his university(?) but then the dude likes this other guy (i think it was a teacher). So then the protagonist finds out that both these two actually like each other but were to scared to convey it to one another and instead of pursuing his own love for the dude he instead helps the dude convey his love for the teacher (?) before the teacher went to a marriage interview (?). And they lived happily ever after except for the protagonist and that's how it ended and also how i cried. 😢

Hmm I think it's Emotion Circuit.