 If you liked
Ghost Hunt
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 ...then you might like
Corpse Party: Tortured Souls - Bougyakusareta Tamashii no Jukyou
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Here we have two anime with a very similar concept : a group of students involved in supernatural horrific situations and trapped in closed areas , and try to figure-out a solution to bring peace ( exorcise to be precise ) to the ghosts they are dealing with. However, Ghost Hunt is oriented to paranormal investigation and have not real gore scenes.