Gentian

In the city, convenience stores are open, trains run, students go to school, and office workers head to work. At first glance, it looks no different from any ordinary day in Japan.

—However, in this country, "combat" was far too close for comfort.

Grotesque lifeforms that easily devour humans. Giant monsters capable of devastating entire cities. Dark organizations operating in the shadows, involving civilians. And the countless incidents caused by them.

There is no magic or superpowers. That is why humanity must face these threats using only their bodies, wisdom, and weapons.

To protect the citizens, eliminate threats, and annihilate evil.

Japan needed an Abnormal Disaster Countermeasure & Annihilation Agency.

The combat organization belonging to that agency—

Gentian

Composed of six units from Unit 1 to Unit 6, each with different roles, it is an organization that boasts some of the best skills in the world.

Unit 1

The elite of Gentian, specialized in combat. There are only 4 combat members.
However, each individual's combat ability is so exceptionally high that it more than compensates for the small number.

Among them—Guest is the strongest in Unit 1. In other words, they stand in a position hailed as the strongest of humanity.

Unit 1 is given top priority for deployment in critical missions and is sent to cases judged impossible for other units to handle.
Furthermore, Unit 1 is responsible for directing other units, coordinating operations, and training new recruits.

Unit 2

Responsible for combat and assisting Unit 1.
While not at the level of Unit 1, they possess high combat capabilities. They fill the gaps when Unit 1 is deployed on large-scale missions and often work together on assignments.

Unit 3

Responsible for a wide range of field duties, including combat, guiding civilian evacuations, and transporting the injured.
This is the unit with the largest number of members in Gentian, and they are often the first to rush to the scene when incidents or disasters occur.

Unit 4

A unit specialized in medical care and dissection.
From treating combatants and performing emergency surgeries to handling the injured and even dissecting monsters and lifeforms, they support the organization from behind the scenes of combat.
Enlistment is voluntary and requires passing a rigorous aptitude test.
Therefore, the people belonging to it are all excellent in both medical skills and judgment.

Unit 5

A unit specialized in the manufacture and repair of weapons and combat uniforms.
They create, maintain, and keep the weapons and combat uniforms used by Gentian combatants in top condition at all times. (Both are made-to-order.)
Like Unit 4, only volunteers can take the exam, and only those who pass can join.

Unit 6

A unit for apprentices and new recruits.
Those who have not yet been formally assigned as combatants belong here and train daily.
Through exams held once a month, it is determined which of Units 1 to 3 is suitable for their aptitude.
(Basically, Unit 1 handles recruit training. If impossible, the top 10 members of Unit 2 take over.)

These six units are further divided into various squads for their activities.

The one who passes orders within a squad is the leader. A person with excellent skills in every aspect becomes the Captain.

Enlistment Probability Unit 3: Approx. 85%. Unit 2: Approx. 15%. Unit 1: —Almost 0%.

Being selected for Unit 1 is in itself proof of extraordinary talent; most humans, and even non-humans, cannot stand against them alone.

As a rule, after one year in Unit 6, a member is formally assigned to one of Units 1 to 3.

However, if judged mentally or physically incapable of combat, they are discharged. Also, if judged that their skills are still insufficient and further training is needed, they are demoted back to Unit 6.

Age and gender do not matter. Only one thing is required.

What can that human achieve?

That is all. And today, once again, an abnormal situation occurs somewhere in Japan.

A monster attacks the city. A grotesque creature devours people. A dark organization begins to move. To protect the citizens, someone must fight.

But if that threat is something that ordinary units cannot possibly handle.

The ones called upon are only four people.

Gentian—Unit 1.

And Guest, the strongest among those four.

You are the hero of the people, and their light.

GENTIAN Headquarters Main Building

GENTIAN Headquarters Special Wing