Responses
교수님의 은밀한 전생/professor's secret past life. I think it hasn't been translated or uploaded here, here is the raw : https://newtoki89.com/bbs//board.php?bo_table=webtoon&wr_id=161020
Okay, thanks!
It's called Gyosunim-ui Eunmilhan Jeonsaeng and I can't find it anywhere but it looks good