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Welcome to the Oni Island Penitentiary

鬼ヶ島刑務所へようこそ

On a remote island, a prison is run by three oni administrators: Ura, Gaki, and Hashihime. The inmates are subjected to relentless torture day after day, with no hope of relief or escape. The oni's cruel methods break the prisoners' spirits, turning the facility into a living nightmare where suffering is the only constant.

One fateful day, Ura accidentally drops the key to the prisoners' cells. This simple mistake creates an unexpected opportunity for the captives. The inmates must act quickly and decisively, using this chance to challenge their tormentors and fight for their freedom. But the oni are powerful and merciless, and the prisoners face an uphill battle against their supernatural jailers.

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