Kageyama Shigeo is an average middle school boy, called Mob 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 realizes his psychic power is dangerous. To avoid his power getting out of control, he constantly lives a life under emotional shackle. Mob wants to live just like others, but a barrage of trouble comes to him. With the suppressed emotions growing inside Mob little by little, his power threatens to spill over its bounds.