Sunny Island: An island used to cultivate superpowers, existing independently as a city. Most of the residents are minors.
Decision: The way the superpowers active in the Harushima Game City area fight. Ability is divided into one to nine realms, with one realm being the highest.
Final exam: Ability assessment exam.
Punishment: The common name for the deciding game.
Unbounded: The ability to transcend one realm, which no one has yet achieved.
Ranking: Ranking of ability users refreshed every two hours.
Yangmen High School: an aristocratic coeducational high school.
Hakuye Girls' High School: The girls' junior high school with the highest average ability in Harushima.