RPG masters tri-Ace present their latest action RPG opus! 12 youths die in a strange explosion in the heart of Tokyo. They awaken to find themselves in a mysterious world, where they have been granted immortality and god-like strength. They have the chance to become mortal again and return to their previous lives but only 11 individuals can be revived, leaving one to be lost forever to the Underworld.

For what purpose have they been brought to this land? What unknown truths will they unravel along their journey? Battle enemies and the armies of Chasseur as you search for your other teammates, complete quests and side events, and learn the truth of why you have been chosen.