 If you liked
World Trigger
|
 ...then you might like
Owari no Seraph
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There are several things these shows have in common, namely:
1. Both shows are about humans being under siege, in OnS it's by vampires, and in WT it's by "Neighbours". In OnS most of humanity has been wiped out, but in WT it's never really made clear if the damage only applies to that specific area in the world or if there are other places.
2. Both shows feature main "companies" that were created to defeat these enemies:
OnS: Moon Demon Company - WT: Border
3. Both shows have similar enemies, that also are similar in power/strength:
Weaker ones:
OnS: 4 Horsemen of John - WT: Trion Soldiers
Strong ones:
OnS: Noble
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In both animes, they have special organisations who can fight the enemies, they need to work in a team to fight overpowering non-human enemies, and they need a special weapon to be able to kill the enemies.
To repel an invading force of both monsters and humanoid enemies teen soldiers must fight using melee and long-range combat in an urban setting. Our protagonists must learn to work together as a team to protect those they care about.