Not really sure if it was a novel or a manga, it could even have just been a dream i had and it was all in my head but just wanted to ask to make sure first. All I remember was the mc investigating a girls death and he ended up finding her spirit trapped in this weird room. He tried to question her about everything to find the truth but just as she opened her mouth, slits opened everywhere on her body screaming at her to shut up. It was like every being dead or alive screaming their lungs out telling the ghost to be quiet Or something like that, anyone know?