A spin-off story focuses Kazuma Ikezawa (King Kazuma), Natsuki Shinohara's cousin, as he battles his way in the Oz Martial Art Competition.


When timid eleventh-grader and math genius Kenji Koiso (Ryunosuke Kamiki) is asked by older student and secret crush Natsuki (Nanami Sakuraba) to come with her to her family&rsquo;s Nagano home for a summer job, he agrees without hesitation. Natsuki&rsquo;s family, the Jinnouchi clan, dates back to the Muromachi era (1336 to 1573), and they&rsquo;ve all come together to celebrate the 90th birthday of the spunky matriarch of the family, Sakae. That&rsquo;s when Kenji discovers his &ldquo;summer job&rdquo; is to pretend to be Natsuki&rsquo;s fiance and dance with her at the birthday celebration. As Kenji attempts to keep up with Natsuki&rsquo;s act around her family, he receives a strange math problem on his cell phone which, being a math genius, he can&rsquo;t resist solving. As it turns out, the solution to the mysterious equation causes a bizarre parallel world to collide with Earth, and it&rsquo;s up to Kenji and his new fake family to put reality back in order. 
(Source: Twitch)

Kenji Koiso is a high school student with a crush on a kendo club beauty, Natsuki Shinohara, and a knack for mathematics. His aptitude with numbers earns him a part-time working maintenance on the global virtual reality world, OZ. 
 
One day, right before summer vacation, Natsuki asks Kenji to do her a favor -accompany her to her great-grandmother's 90th birthday celebration deep in the Japanese countryside. As Kenji tries to find his footing amongst the boisterous and tightly-knit Jinnouchi clan, receives a mysterious email with a long code and the message: "Solve me." Little does Kenji know what solving that code could lead to...
 
(Source: Kodansha USA)

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