Shigeo Kageyama is an average middle school boy, nicknamed Mob (モブ: means John Doe) for lacking a sense of presence. Although he seems like an inconspicuous person, he is in fact a powerful esper. As he grows older, Mob realises his psychic power is dangerous. To avoid the power getting out of control, he constantly lives a life under emotional shackle. Mob wants to live just like others, but a barrage of troubles come to him. With the suppressed emotions growing inside Mob little by little, his power threatens to overspill its bounds.