In a place that people can't see, there is a group of people who fight desperately to protect them. They belong to a special department and are called outsiders. They are people who have been selected and excluded by the world. They have powerful abilities and fight outside the boundary with monsters that come from nowhere and want to invade their homeland. They are forgotten by the people they love and love them, and they wander on the edge of this world.
The world is a grand lie. If forgetting can make you sleep peacefully and no longer worry about it, then everything I have done will have meaning. Today is the 2193rd day since you forgot me. I still miss you very much.
—Jiang Zong
Concept: Love is the pure land of nothingness