Creatures from another dimension have invaded Earth! Earth weapons are useless against these 'Neighbors,' but some scientists have created new weapons based on the enemy's technology. Using these weapons, humans struggle to defend themselves from the invaders.
Unfortunately, the problem with Base 7 is, in fact, Tadashi. He's a terrible leader who cares for nothing but his own reputation and believes that being the central base leader's son allows him to do whatever he wants. Will Jin be able to fix this terrible situation?
Between the 3, it was released last and is the second world trigger prototype.
The reason why Jin from the main series calls himself the "talented elite" is possibly a homage to the One-shot's title
The term Neighbors exists and are shown to be what we now know as Trion Soldiers
Additionally, this may be why trion soldiers are introduced to us as neighbors
Border also exists but uses numbers instead of names
Triggers are called neighbor-craft, but the two shown more closely resembles triggers from the main series,
Fūjinmaru is similar to Fūjin in name and premise as they both look like Kogetsu and have an extending blade
Escudo share the same name as Escudo and are extremely similar in premise, both being walls that come from the ground that act as shields but Escudo from the one-shot can be used as a weapon while Escudo from the main series can be used more akin to a trap