In a world where imaginary friends are real, they coexist with their owners. After an attack happens between humans and imaginary friends, imaginary friends are given wristbands, showing who they belong to. Chaos starts. Jenny is just trying to live her life, with her companion Arius, who appeared during her edgy phase. He’s a sweetheart under the appearance of a demon. She’s a clever and strong young woman. Together they navigate this crazy world.