[Welcome Sion, to the system space.] Sion wakes up alone in an empty space, accompanied only by a cold voice, the E.F.E System. Not knowing anything beyond his name, he is sent to complete tasks in various worlds if he ever wishes to recall his memories. In the back of his mind, his memories rage behind locked bars trying to force their way through. A promise made to him haunts his dreams, a kind voice swearing to be with him forever. Yet everything isn't as it seems. The system is no benign entity and there's something very wrong happening in the background.