Responses
Pretty sure this is it
http://www.mangago.zone/read-manga/ayashi_no_hakoniwa_ni_ukabu_tsuki/
Thank you!!!!!
Np
It was actually funny because I was reading this earlier today
The uke was an instructor who just started at a boarding school, and the seme was some powerful student with supernatural blood. The seme had a complex about transforming into a monster. Thanks for any help!