Source plot synopsis — published story coverage
Coverage is limited to the scope described in this write-up. Recording changes, further installments or an unwritten ending may remain outside it.
=== Setting ===
One day, a gate to another world opens in Mikado City (三門市, Mikado-shi) and monsters called "Neighbors" (近界民（ネイバー）, Neibā; lit. 'Near-world people') start appearing from it. Humanity struggles to fight the Neighbors, as their weapons are ineffective against them, until a mysterious organization appears that is able to repel the Neighbors' attacks. The organization is called the National Defense Agency, or "Border", and has appropriated the Neighbor technology "Triggers", which allows its user to channel an internal energy called Trion and use it as a weapon or for other purposes. When a Trigger is activated, the user's body is replaced with a battle-body made of Trion.
Plot
Four years following the appearance of the gate, the people of Mikado City have become accustomed to fighting with the Neighbors and have mostly returned to everyday life. One day, a mysterious white-haired student named Yūma Kuga (空閑 遊真, Kuga Yūma) transfers to the local school. Kuga is actually a strong humanoid Neighbor, which he seeks to hide from Border. At school, he meets another student, Osamu Mikumo (三雲 修, Mikumo Osamu), who is secretly a C-rank Border trainee. Since Kuga is unfamiliar with life in Mikado City, Mikumo must help him adjust to life there and keep him a secret from Border.
One day, a gate to another world opens in Mikado City (三門市, Mikado-shi) and monsters called "Neighbors" (近界民（ネイバー）, Neibā; lit. 'Near-world people') start appearing from it. Humanity struggles to fight the Neighbors, as their weapons are ineffective against them, until a mysterious organization appears that is able to repel the Neighbors' attacks. The organization is called the National Defense Agency, or "Border", and has appropriated the Neighbor technology "Triggers", which allows its user to channel an internal energy called Trion and use it as a weapon or for other purposes. When a Trigger is activated, the user's body is replaced with a battle-body made of Trion.
Plot
Four years following the appearance of the gate, the people of Mikado City have become accustomed to fighting with the Neighbors and have mostly returned to everyday life. One day, a mysterious white-haired student named Yūma Kuga (空閑 遊真, Kuga Yūma) transfers to the local school. Kuga is actually a strong humanoid Neighbor, which he seeks to hide from Border. At school, he meets another student, Osamu Mikumo (三雲 修, Mikumo Osamu), who is secretly a C-rank Border trainee. Since Kuga is unfamiliar with life in Mikado City, Mikumo must help him adjust to life there and keep him a secret from Border.
Sources and content license
Source and revision history ↗ · Adapted from Wikipedia contributors, World Trigger. Section headings and formatting adjusted. · Content license