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's impossible to know 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 depending on the Gate's danger level. Each Gate has a boss monster, and the Gate only disappears once the boss is eliminated.

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

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

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

Guardian Academy

A place that fosters Guardians. Mostly consists of theory and training.

Dormitory facilities improve or worsen depending on the assigned rank.

Sparring sessions are held at the training grounds every two weeks.

A tournament is held at the training grounds every three months.

There is a tradition of summoning a familiar in the second year. Three chances are given; if all three fail, you can never summon a familiar again.

Familiars are connected to their summoners via mana, and a contract is signed upon summoning.

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