High schooler Eighto Tachibana has always hated his name, and the "8" jokes that came with it. One day, he meets a classmate named Tomoya Hatta, aka Hachi—the Japanese word for "8." What begins as casual greetings and small talk in the hallway soon becomes something much deeper, and Eighto realizes that it's more than just a similar nickname that draws him to Hachi. Could the number that Eight resented for so long finally bring him something he'll love?