Help! I’m looking for a yaoi manga about a guy who is a university student/teacher but also a drag queen who b

Help! I would really appreciate any help finding this manga! I’m looking for a yaoi manga about a guy who is a university student/teacher but also a drag queen who begins a relationship with a “student”! The teacher had black hair and the “student” is blonde (I think). The teacher also was in a previous relationship with a guy who introduced him to drag queens and that guy was his senpai before the senpai left for another country but came back like a douchbag.