While finding Mysterious at an old rundown warehouse, Spider-Tsundere was attacked by an unknown robot that didn't belong to Mysterious. The mad scientist explains that he's on a quest to conquer both worlds. His new partner is waiting for him back in the other dimension. Spider-Tsundere chases Mysterious into that other dimension, where she meets the Superhero Girls. Will they become friends? or will they become Rivals and Foes? All you have to know is... They'll have to team up to stop Mysterious and his unknown partner or else both their dimensions are doomed.