Now knowing that they are about to wage war with the Demon King and his army of powerful demons, Emra Flame, Takashi Gunner, Saeko Rosei Fang and Duncan Velton all must face not just saving the future, but also looking back at their past selves to overcome their traumas that have been holding them back. Having to face demons like the Moon Sisters, the Seven Demon Deadly Sins and even Lady Papillon and her 4 Elemental Subordinates, will these four be able to overcome these new challenges as well as their old selves before the Demon King; Noel Dragous, takes away their freedom?