Mob Psycho 100

"Shigeo Kageyama is an average middle school boy, nicknamed Mob ("background character"). Although he looks like an inconspicuous person, he is in fact a powerful esper with immense psychic power. To keep from losing control of this power, he constantly lives a life under an emotional shackle. In order to help learn how to control his abilities, Mob works as an assistant to con-man Reigen Arataka, a self-proclaimed psychic..." [Source]