Following the suicide of her best and only friend, Koito Nagase, Ai Ooto is left grappling with her new reality. With nothing left to live for, she follows the instructions of a mysterious entity and gets roped into purchasing an egg, or specifically, a Wonder Egg. Upon breaking the egg in a world that materializes during her sleep, Ai is tasked with saving people from the adversities that come their way. In doing so...