Haruto Satou

When Krystal returned to her world due to having to marry Marmaru-Gias Gisaras to unite the Nokanatika Kingdom and the Empire, Satou entered the teleportation gate and appeared in the other world. When he appeared in the middle of the wedding ceremony between Krystal and Marmaru, a creature from the Abyss appeared. During the confusion, Krystal kissed him and bestowed the Ring of Light to Satou, making him the Ring King.