The Culling Games is a ritual and a massive battle royale between Jujutsu sorcerers of any grade, from the lowest grade 4 sorcerers to the highest which is special grade sorcerers. The Culling Games is created by an evil jujutsu sorcerer named Kenjaku. The Culling Games had been divided into ten colonies that forms a line spread out through Japan. Kogane is a shikigami who is assigned to each player as an informant and assistant, players can dispel it's presence and absence.