Kenji is not your typical high school student. He almost became Japan’s official representative to the prestigious Math Olympiad. Unfortunately, it’s only Math that he’s good at. Famous student Natsuki, in order to impress her grandma, hired Kenji to pose as her boyfriend.
What is supposed to be a smooth outright lie turned into chaos when Kenji received a puzzle via text message which he solved. What he thought to be just another math puzzle was actually the security algorithm of the world’s top online services provider, Oz.
The Oz network plunged into chaos as the hacker gains control of accounts after accounts. Kenji with the help the unlikely members of Natsuki’s family will try to stop the hacker to save their families and the world.