Responses
It's this, right? OMG I like this one too but it hasn't updated for so long
http://www.mangago.zone/read-manga/youkai_gakkou_no_sensei_hajimemashita/
thhhhhANANANJJJJSK SO MUCH YESSSSS
It’s a comedy manga about this teacher being transfered to a school and island full of yokai. He’a a big scaredy cat but he grows to love his supernatural legend students. One scene is where he walks into a reception and sees a beautiful woman with a mask on and comments that she’s pretty. Then she takes off her mask to reveal that she’s the well known kuchisake onna. It’s not a BL but it’s likely a shoujo because it’s just a slice of life teacher getting to know his mythical students and getting over his fears.