The main similarity is there's someone/ something killing the students at school.
In The great shaman Ga Doo Shim, the principal has the evil spirit target the lowest ranking student, while in nightmare teacher its the teacher who makes the student disappear

When i watched the first episode it gave off same vibes, the main characters grant the "wishes "for people and in the witches diner you eat the food in nightmare teacher you have to sign a contract
I recommend nightmare teacher its so good!!!!??