The Battle in the Foul Weather
Round 3 begins in a violent storm. While Mikumo Squad and Kuruma Squad focus on finding each other, Nasu Squad carries out their strategy as planned. Just as Nasu Squad seems to have the advantage, Chika's Ibis strikes. Can Mikumo Squad grasp victory?
Aired 30/08/2015EP 44 - The Battle in the Foul Weather
World Trigger
One day, a gate to another world suddenly opens in Mikado City. Aliens invincible to Earth’s weapons, called “Neighbors”, start coming over. Earth’s only line of defense is a mysterious group called the “Border” who are armed with weapons called “Triggers”.
Four years later, the city has recovered from initial attacks and citizens of Mikado City have started to get used to the Neighbor’s attacks. Yuma Kuga, a transfer student, and his classmate Osamu Mikumo find themselves fighting a Neighbor that suddenly appears. Osamu, who is actually a Border agent, activates his Trigger but is unable to defeat it. This leaves Yuma to activate his own Trigger and defeat the alien. Yuma reveals that he is not part of Border and is actually a Neighbor who has transferred from the other side.
(Source: Crunchyroll)