Demon King from Today!

A Forbidden Box (1x30)

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Yuri learns of the Four Forbidden boxes that will bring destruction. Murata seems to know a lot more about this world than he should, raising questions as to his true identity. Murata and Jozak devise a plan to rescue Yuri and escape. However, in the end, when Murata's life is in danger, Yuri refuses to run away and leave anyone behind again.