I wouldn't call it yaoi I would tag it as shounenai I've seen Chinese shounenai manhua with a lot more romance then this the teacher was no pervert and that's awesome but it was boring way too short I wish it was longer
A cute one-shot about a boy and his older brothers teacher. His teacher likes his brother. His brother likes his friend. His friend likes his brother. Romance spawns between the boy and his brothers teacher as well as his brother and his friend.