Saiki Kusuo finds himself in his third year of high school after the events of Saiki Kusuo no Ψ-nan: Kanketsu-hen (Conclusion). He's adjusting to his new life... until he gets caught up in some regrettable incidents witnessed by none other than Teruhashi Kokomi. It may change Saiki's life in more ways than he could have ever foreseen.

What if Mob didn't have those broccoli seeds with him? But instead used the Tiochiro's energy to make a portal into a new world? How Will Mob react? Can he ever go home? I DO NOT own any of the art or Mob psycho or RWBY. RWBY X MOBPSYCHO100 Crossover (spoilers)