The event also confirmed the opening and ending theme artists, with Kami wa Saikoro o Furanai returning to perform the new opening theme “Time Factor” while the ending theme will be performed by Fantastic Youth titled “Ungai Dōkei”.
Invaders from another dimension, referred to thereafter as Neighbors, overran the area around the gate, leaving the city gripped by fear.
In a short time, they managed to build an enormous base and prepare a defensive system against the Neighbors. it’s been four years since then.