(Spoilers for Planetarian, Little Busters and Mahou Shoujo Madoka Magica)
Imagine Yumemi being the actual God of everything that has happened in Key universes, but some of her features was actualy a government project that’s made after obtaining a certain alien element called Keyonionum from a space expedition (minor LB spoilers from Kud’s route) (one which Kudryavka’s mother [or even Kudryavka herself] has taken part in). The element was then has made experiments on throughout the years, with the help of quantum computers causing the Third World War, a war of power clashing between nations. Sealed in a planetarium for years to hide from the outer nations, with a hidden feature of creating microuniverses, simulations that create an energy source of a certain wavelength, out of some Keyonionum; observing the world around her through the cameras outside the planetarium, Yumemi sees a human that’s affected from the after effects of a Keyonionum but on a cellular level (our boi Junker). After her encounter with him, his condition activates her secret feature of creating microuniverses to alter the time-space continuum, she puts her knowledge of the world (Main Realm) into the work and creates little sentient programs called Users to interact with the microuniverses. These microuniverses come with pre-made scenarios that are made by certain scientists that worked on the project. With the activation of the feature called God’s Hand, the Junker’s conscience is made into the Overseer of all microuniverses and the main power source of all the simulations. And her only purpose is to create a utopia that everything is okay… by feeding off of the emotions of the people inside Key universes, kinda like (Madoka spoilers) the Incubator from Madoka that’s trying to maintain the energy balance of the universe by clashing the Witches and Magical Girls.