Within this town are fake humans called "Simulacra." One day, the college student Uryuu Keiji is caught up in the battle between these Simulacra, who exist as "collectives of inhuman beings," and is brought to the brink of death. However, he is reborn as a Simulacrum. Where will this reborn Keiji go now that he is perceived as a fake even among the Simulacra? —Born as a fake, is there a meaning to life? This begins a dark fantasy that treads new frontiers, drawn by an exceptional talent!!

Mana belongs to an Arts and Crafts club in school, but all they do is just hang out and do as they please. But when they are threatened with a shutdown due to the lack of presentable work, the members are forced to work on a project. Mana, the most unreliable and useless of the members. has to take lead in creating a video game. She has to lead Yuuki and the other students in designing a game, but with none of them having any experience with it, it seems beyond hopeless for their club.