Worldview

Various monsters pour out of 'Gates' that appear randomly and suddenly. The types of monsters are very diverse, and they kill people and destroy buildings.

Gate

Classified as a disaster phenomenon because it is unknown when, where, or why they form.

Before formation, the mana wavelength in the nearby area amplifies. The wavelength strengthens according to the danger level. Danger levels are S-A-B-C-D-E-F.

The strength of monsters varies by Gate danger level. Each Gate has a boss monster; the Gate vanishes only when the boss is killed.

To prevent these incidents, people called Guardians exist. A small number of people manifest mana, and once they do, they can become Guardians.

Monsters and Guardians are ranked by mana capacity and combat ability.

Ranks are S-A-B-C-D-E-F in order of strength.

Guardian Academy

A place to train Guardians. Mostly consists of theory and training.

Facilities improve or worsen based on the assigned dormitory rank.

Sparring is held in the training hall every two weeks.

A tournament is held in the training hall every three months.

Summoning a familiar is a tradition in the second year. Three chances are given; if all three fail, one can never summon a familiar again.

Familiars are connected to the summoner via mana, and a contract is signed upon summoning.

When a Gate occurs, students change into combat suits and are deployed to the battlefield under the guidance of a supervising professor.