"Kenji Koiso is a high schooler with a crush on Natsuki Shinohara, a kendo club beauty. His aptitude for numbers earns him a part-time job working maintenance on the global virtual reality world, OZ. One day before summer vacation, Natsuki asks Kenji for a favor--accompany her to her great-grandmother's 90th birthday celebration in the countryside. As Kenji tries to find his footing among the boisterous and tightly-knit Jinnouchi clan, he gets a mysterious email with a complex code and the message: "Solve me." Little does Kenji know what solving the code will lead to..."

Reads from right to left.