In the first season, the protagonist, Chou Soran, hiding that he is an “outsider” (someone able to use special abilities) encounters a mysterious girl named Fuu Houhou who holds the secret of eternal life.

Together, they will enter the Raten Tournament where they will try to solve the mysteries related to them.

The second season marks the beginning of the fighting tournament between Outsiders while mysteries will gradually be unveiled and new characters will appear.

[Source: Crunchyroll]