Rayseer Kingdom

 (レイセヘル王国, Reiseheru-okoku) is the kingdom that performed the ancient ceremony of Hero Summoning which summoned Mukoda, Kaito, Kanon and Rio. Unknown to them, the real purpose was to expand the kingdom's territory. Rayseer is a nation with racial discrimination, who abuses other races such as Elves, Dwarves and beasts. The foolish King Ivan set up a war against neighboring countries, but eventually was defeated in response to the revolt of slaves and the fierce counterattack of neighboring countries. The royal family and nobles were executed, while some were enslaved to the kingdom of Malbert. disappeared from the map.