Self-proclaimed exorcist and secret fraud Arataka Reigen attempts to banish an evil spirit, but only annoys it. Reigen then calls for his secret weapon, an actual psychic with incredible powers, middle school student Mob.

The Telepathy Club are told that they will be shut down by the student council due to lack of members. Inukawa thinks of asking Mob to join, but Mob gets a call from Reigen about an incident at Highso Girls' Academy.

Mob wants to grow stronger and get closer to his beloved Tsubomi-chan, so he joins the Body Improvement Club, but he suddenly faints as he's running along the riverside.

After an incident with the religious organisation, the evil spirit Dimple keeps following Mob around. Then Mezato Ichi from the school paper begins to follow Mob as well.

Mob is challenged to a one-on-one fight with Black Vinegar Middle School's shadow leader Hanazawa Teruki, otherwise known as Teru. Mob doesn't use his powers, but Teru goes all out and destroys everything around him.

Peaceful days come back after Mob's fight with Teru and the president of the Telepathy Club, Kurata Tome, drags Mob around to find other espers. Reigen continues to swindle people as a fake psychic.