My all time favourite yaoi manga, the uke is on the rooftop awkwardly trying to confess to s girl, the girl misunderstands his confession for insults and gets offended instead. On the same rooftop there's a teacher laughing at his confession, the teacher starts teaching him how to confess??
The teacher takes a liking to him and starts bullying him and making home come to his office and makes him do chores.
Is a very cute story!
Sensei Nante Kirai Desu.