The Great Shaman Ga Doo Shim (2021)

Shorter Korean dramas with a ghost seeing FL and supportive ML.
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Both are Korean dramas with a FL who can see ghosts and a ML who can help them in some way with their power.

This show has a lot of similarities. Both of them have the supranatural and kinda spirit world. The leads are very similiar both of them fighting the ghost. Is the thai virsion on Bring it on, ghost.

Main character is the descendant of a shaman and doesn't want to use their powers but sees ghosts all the time. Other main character finds out and keeps their secret.

Both Ghost seeing Leads who solve one main story of the past
Kdrama GaDoShim has school setting and a very cute young cast (in fact all the other series of this FL are fantasy ghost genre) It will have a season two later

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

Both the Dramas Synopsis sound a bit similar and has some Similarities like:
#Ghost Seeing Female Lead
#Fighting Evil Spirits, etc..
and it also has some dissimilarities like the main leads are young students in the Drama, etc.

school drama
It’s a good fantasy romcom with action
the cast work together to fight evil
strong female leads and growth of male leads
they both give me a similar vibe
Friendships and teamwork
bonus: multiple couples
Good drama to waste some time while waiting for this drama to air

Both really good underrated dramas

Both are mini dramas with a human lead who can see ghosts and evil spirits.
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Both are mini dramas with a human lead who can see ghosts and evil spirits.
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both fight evil spirits that possess people
both have school themes and refer to bullying
both have strong friendships
both are very good similar dramas and if you liked one you will love the other, promise

Both dramas have a lead who can see ghosts and a character who is a ghost. Both dramas involve character growth for the lead(s).

less about spirit and more about life problems in high school and some "monsters" (that are always related with some internal problem with some student) who are defeated by high school students

Well I think its quite similar because it has a connection with ghosts, spirits and shaman...so yeah

Both are short dramas with a FL who sees ghosts and a ML who is either supernatural or has supernatural powers who can help her.