Mob Psycho 100 III revealed a preview for the final episode. This is not only the season finale, but also the final episode of the series which fully adapted ONE’s manga. Mob is still out of control and Reigen will come to his aid.
The official Mob Psycho 100 website describes the plot of the final episode as:
Mob pushes forward. Amidst the destruction and chaos, Reigen arrives with Serizawa’s help and frantically talks to Mob. “Hey, Mob. There’s something I haven’t been able to tell you for a long time.” Reigen confesses the truth. With these words, two things become “one” in Mob’s consciousness. The confession to Tsubomi, the explosion of youth, and all the overflowing emotions finally reach 100% in this final episode of the series!
The final arc of the series previously revealed a trailer:
Studio BONES is animating the third season of the anime. Takahiro Hasui is directing, with Hiroshi Seko in charge of the series composition and Yoshimichi Kameda once again on character designs. Kenji Kawai is composing the music. The theme songs are “1” (opening) and “Cobalt” (ending) by MOB CHOIR. A special ending theme, titled “exist” was also featured in the two episodes of the season.
Source: Official Website
©ONE, Shogakukan／Mob Psycho 100 Project 2022