After Psycho Helmet's appearance, tree roots start emerging all around the city. Sensing danger, Mob goes with Reigen and Ritsu to destroy the Divine Tree, but eventually, they are overwhelmed by the members of the Psycho Helmet.

Mob heads into the Divine Tree, only to have to face off with Teru. Mob finds himself speechless, having to confront even Teru who has been completely brainwashed by Psycho Helmet.

Mob's attitude seems to change once he hears what Dimple says. Mob apologizes to Dimple for getting carried away with the thought of being popular and for not hearing what Dimple had been trying to tell him.