About
A gate to another world opens in Mikado City, and monsters called Neighbors emerge. It's up to Border Defense agent Osamu Mikumo to fight them.
Cast
Nao Tamura
as Chika Amatori (voice)
Yuichi Nakamura
as Yuuichi Jin (voice)
Tomo Muranaka
as Yuuma Kuga (voice)
Yuki Kaji
as Osamu Mikumo (voice)
Hideyuki Tanaka
as Replica (voice)
Megumi Urawa
as Youtarou Rindou (voice)
Eri Nakao
as Shiori Usami (voice)
Nobuhiko Okamoto
as Jun Arashiyama (voice)
Seasons
Season 1
A gate to another dimension has burst open, and from it emerge gigantic invincible creatures that threaten all of humanity. Earth's only defense is a mysterious group of warriors who have co-opted the alien technology in order to fight back!
Season 2
The border defense organization "Border" was established to fight against the attacks of the "Neighbors" who possess unknown power. Osamu Mikumo, a member of the Border, forms the Mikumo Squad with Yuma Kuga, a Neighbor who he met by chance, and his childhood friend Chika Ametori, and they struggle to win the internal Border rankings in order to join the expeditionary force to the Neighborhood.
Season 3
With Hyuse joining the Tamakoma Squad, the rank wars are continuing and the Tamakoma squad are striving to get selected for the Away Missions.
Episodes
Season 1
Visitor from the Other World
Approximately four years ago, a gate to another world opened in Mikado City, and invaders called Neighbors appeared.
Neighbor and Trion Soldier
Border sees the Neighbor Yuma as an enemy… but Osamu is unable to view him as someone with hostile intentions, and trust begins to bloom between the two boys. Osamu finds himself caught between his own thoughts and the rules of the organization he belongs to, Border.
Osamu Mikumo's Ability
Combat-use Trion Soldiers attack when a gate opens in Osamu’s school just outside of the Forbidden Zone. Worried he’s not strong enough, Yuma tries to stop Osamu from fighting back, but Osamu’s determination to save the other students is limitless.
Ai Kitora, A-Rank No.5 Agent
Osamu gets more trouble than credit when he claims to have defeated Trion Soldier Marmod. Really, he’s covering for the Neighbor, Yuma. Kitora, an A-rank Border Agent, is furious with Osamu for stepping out of line… But does she suspect the truth?
Power Elite, Yuichi Jin
Kitora boldly jumps onto the back of Ilgar, a new type of Trion Soldier, while it’s mid-flight and bent on attacking the city below. Suddenly, Ilgar transforms, enters self-destruct mode and plummets toward its target. How will she escape now?!
Chika Amatori's Side Effect
Yuichi and Osamu's critical mission to investigate the abnormal gate puts a lot of pressure on Osamu. Meanwhile, Yuma follows Replica’s advice and conducts an investigation of his own. The next morning, Osamu and Yuichi have a fateful meeting with Yuma...
Miwa Squad's Assault
Osamu reaches out to Yuma and Replica. He and Chika learn some critical information about Neighbors from Yuma, but they're soon discovered by two A-Rank agents, Shuji and Yosuke; they're searching for a Neighbor in human form...
Black Trigger
A-rank agents Shuji Miwa and Yosuke Yoneya make an assault on Yuma without even asking what happened. Osamu calls Jin to help.
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