World Trigger

ワールドトリガー

When a gate opened over Mikado City, alien invaders called Neighbors began crossing into the world, and the defense organization Border arose to fight them with weapons called Triggers. Osamu Mikumo, a meek student secretly training as a low-rank Border agent, befriends transfer student Yuma Kuga, who turns out to be a humanoid Neighbor hiding his nature. Osamu must keep Yuma's secret while the two are drawn deeper into Border's war.