Hitsujiya’s life is forever changed when his high school friend Kokudo reveals the secret of “hacks.” By following specific instructions found in a mysterious notebook, he can alter reality itself! 

Kokudo and Hitsujiya experiment with the hacks and learn more about their strange nature. It’s all fun and games at first. But when Kokudo uses a hack to go back in time, things take a dark turn. Hitsujiya attempts to do the same thing, but if a hack’s directions aren’t followed precisely, the results can be devastating!