Shigeo "Mob" Kageyama is an eighth-grade student blessed with extraordinary psychic powers. However, Mob decides to suppress his abilities in public due to its destructive and conspicuous nature. To keep his psychic powers honed, he works under Arataka Reigen—a self-proclaimed esper looking to make use of Mob's skills.

Alongside Reigen, Mob spends his days exorcising evil spirits at Reigen's behest. With the simple wish to impress his childhood friend Tsubomi Takane, Mob works toward making himself more desirable. But troubles keep on bombarding his daily life, slowly breaking his shackled feelings. With his repressed emotions welling up, there's no telling what will happen once he reaches his limit.