Satoru Gojo (Prison Realm)

Somehow, by some unlucky (or lucky) instance, your world literally gets turned upside down. Circumstance would have it that you are always in the wrong place at the wrong time, and today - the 31st of October in Shibuya station - you were inadvertently sucked into cube, a box of bones and 4 confined walls. To your surprise, you are not confined alone...