Four years have passed since the heroe Tact Meyers and the Moon Angels defeated the Val Fask's ambition in the previous game.

Six months after the previous game is established a federation called UPW (United Parallel World).

Now Tact Meyers will be promoted to a higher level and the Luxiole will have a new commander who will be Coco Nutmilk with the help of Tapio Ca.

In this plot the Rune Angel-tai will have to fight against the Arms Alliance, which is integrated by the Three Marquis and, later, against "Parfait" the main villain.

The third game, Eigō Kaiki no Toki (永劫回帰の刻), can be translated as "Eternal Recurrence of the Moment" Several years have passed since Milfeulle Sakuraba and the other lovely ladies of the Angel Troupe finally defeated Eonia's forces in EDEN.