Prologue.

Ben Tennsyon is just an ordinary boy unless you count just a few things. Firstly his best friend is a water controlling Magical Girl from another universe. Secondly, he goes to a school that lies in a fracture between universes in a planet sized building with infinite rooms that lead to who knows where. And, most notably, he has a an alien watch that lets him transform into super powered aliens.

After surviving the Radiant War, Ben has only several things on his mind. Survive his new school, take care of his sister, and find his friends and bring them back. If only the third option were that simple.