It's great that Mob joined the Body Improvement Club, but he suddenly faints as he's running along the riverside. His wish is to get stronger and to be able to get closer to his beloved Tsubomi-chan. One day, as Mob is feeling troubled, a woman with a strange mask approaches him... Progress toward Mob's explosion: 20%.

Mob and Teru infiltrate the Claw's 7th Division to save Ritsu. Meanwhile, Ritsu tries to escape with the other esper kids and they run into the upper echelon and leader of the 7th Division. Teru and Dimple run into trouble after a strenuous battle, and the boss from Claw finally shows himself...

Mob gets trapped inside a parallel world created by Mogami Keiji. Minori ends up transferring to his class, and Mob becomes the target of bullying. He can't ask anyone for help, and his negative emotions start to build inside. The truth behind the tragedy that Mogami went through when he was alive comes to light. Meanwhile, Reigen and the others were waiting for Mob to regain consciousness back at the Asagiri mansion. Dimple attempts to save Mob by infiltrating Minori's body.

The group somehow finally makes it to the summit of Mt. Mudboat. Takenaka had been up all night reading all the texts about UFOs and the Telepathy Club comes together to send a telepathic message into space, but there is no UFO in sight.