During his time as the new Ring King, Haruto Satou has successfully married all of the five Ring Princesses and gathered their rings. To fully draw out the power of the rings and defeat the Abyss King, Krystal Novaty "Hime" Nokanatika's grandfather decides to summon her magically talented little sister, Morion Ravri, to teach Satou and his wives more about magic.

However, their magic practice will not be enough. If the princesses want to obtain the strength befitting the Ring King's wife, they must visit three important locations: the Elves' Great Library, the Empire's Mythical Armory, and the Spire of Magecraft. During their journey, the group discovers that the Abyss King had invaded Satou's body during their previous battle, which threatens his life and the whole mission. Despite the danger, Satou is determined to grow his bonds with his wives and overcome anything in his way to save the world from the Abyss King's wickedness.

[Written by MAL Rewrite]