The radio Boombox Boom is the main character of the series, meets Pepi to help her change his life, but in doing so he actually tries to ask for help.
His world, the Universe of Sound, is threatened by a terrible power. Boom is an Advanced Tech Device (ATD), able to cross the d-brane between contiguous universes.
After abandoning Pepi in the pilot, Boom disappears and we find her again starting from episode 7 in her true form of "God of The Dance"...