Help Finding Yaoi Manga

Hey guys! Anyone remember the name of the manga about a guy (who's a sub) who was a regular customer at a secret establishment where he would meet up with his dom to have fun times~. His dom wore a mask at all times so he doesn't know what he actually looks like (besides his long hair). His dom suddenly told him that it would be their last session together there (I think?) and so the MC tries to move on. He gets a new job as a teacher at a pretty elite school, only to discover that one of his students may be his dom?!

I can't find it for the life of me. I thought I saved it to my list but I guess not? Please can anyone help me? Thanks so much!