Crow's Blood (2016)

Both have similar vibes about a virus infection and changing peoples mind.
Dark hole is produced on a large scale and has action sequences.
Crows blood is more of drama however has some gory blood scenes. Is happens in the school setup. Though its not a great series, just can be seen if someone has inclination for this genre.

If someone likes this kind of theme, they can try crows bblood.

It similar to girl from nowhere and they both do similar actions
And they both transfer schools the main character is also strong and weird things also start happening after the girl enters also lost of tragedies too

They both are strong and evil characters and discover the truth they both transfer schools and tragedies happen and weird things start to happen after the main character enters the school