About

In this world, upon reaching the age of 19, individuals form a contract with an 'Entity.' These Entities grant their powers to the humans they contract with. The types of abilities are countless and incredibly diverse, leading to the establishment of a 'Class' system. Among these numerous Entities, the ones belonging to the highest class are 'Light and Darkness.' Contractors of these Entities gain immense salaries, power, and high social status. However, a contract depends entirely on the Entity's whim; if a human does not please them, they will never form a bond. Every human desires to contract with a high-class Entity. But since it is a matter of luck akin to winning the lottery, those who succeed attain even greater prestige. But why did these abilities emerge in the first place? It was because of the 'Beasts.' Cruel monsters without thought or emotion that devour every human in sight. Entities and Contractors were born to stop them. Once contracted, a Contractor must eliminate more than 150 Beasts per year. Failure to do so results in the government erasing both the Entity and the Contractor.