Suppose a Kid from the Last Dungeon Boonies Moved to a Starter Town, Vol. 13 (light novel) — Toshio Satou

WHO GOES TO JAIL WILLINGLY?!

To uncover Eve's diabolical plans, Rinko and Alka launch an investigation into Hell's Lock, a maximum-security prison that houses the worst criminals on the continent. But through a series of mix-ups, Lloyd gets entangled in their operation and ends up a prisoner! Naturally, the cluelessyet- mighty hero gets it in his head that he signed up for a mentalfortitude training camp and takes to his new situation with his usual pep, terrifying the hardened inmates of Hell's Lock in the process. However, with Lloyd's arrival, sinister schemes afoot in the prison come to light, and somehow, the only way to stop them is through a jailbreak?!