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Kaido Autumn is a high school student with unnatural physical strength and athletic ability. And despite all that skill, he's willing to throw it to the side for the ones he cares for. One day at school, his friends attract strange creatures by unsealing a ancient puzzle box. Kaido is then possessed by the spirit of the puzzle box, a spirit fond of childrens games.

This series is rated Young Adult. Please review the Content Ratings page for more information.