The ordinary life of a young elementary school student, Hirabondo, begins to show signs of collapse due to a sudden warning, or rather, a message from the custom-made robot "Roboco" on her knee.
One day, from a distorted space-time altered by some unknown force, a variety of Robocos from completely different worlds gather. These Robocos come from alternate timelines, or the multiverse, where they are active in various genres—classic battle stories, hardcore sci-fi action, romantic comedies, and even retro gag manga from the Showa era.
This mix of worlds starts to collide, creating an absurdly hilarious situation for Hirabondo, where his once peaceful life is turned upside down by the chaotic antics of these multiversal Robocos!