Earth is under constant threat from Neighbors, invincible monsters from another dimension that destroy our way of life. At least we have the elite warriors of Border, who co-opt alien technology to fight back!Our hero Osamu Mikumo may not be the best agent, but he’ll do whatever it takes to defend life on Earth as we know it.When Osamu meets a feisty humanoid Neighbor named Yuma, everything that he thinks is right is turned on its head. Can the two natural enemies ever beco...

Earth is under constant threat from Neighbors, invincible monsters from another dimension that destroy our way of life. At least we have the elite warriors of Border, who co-opt alien technology to fight back! Our hero Osamu Mikumo may not be the best agent, but along with his Neighbor friend Yuma, he’ll do whatever it takes to defend life on Earth as we know it. Ever since they met, Osamu has protected the feisty Neighbor’s identity, but he’s about to get a rude awakening that Border has ...

Earth is under constant threat from Neighbors, invincible monsters from another dimension that destroy our way of life. At least we have the elite warriors of Border, who co-opt alien technology to fight back! Meet agent Osamu Mikumo, not the best, but along with his Neighbor friend Yuma, he’ll do whatever it takes to defend life on Earth as we know it.

It’s the final day of the battle simulation exercises, and the formerly superior Ninomiya’s Squad 8 is in decline now that others are exploiting the weaknesses of Chika’s units. While Chika grows more and more frustrated, Ninomiya himself is keeping tight-lipped about the whole thing… That night, it all comes to a head when an irritated Ema confronts Ninomiya!

Day six of the Sealed Environment Phase commences, and Wakamura’s Squad relies on Hyuse’s knowledge to complete their assignments. Meanwhile, Suwa’s Squad takes on the day’s sim battles using Osamu’s strategy, but all of their moves end up being countered! Will they be able to bounce back in the rankings?

Border headquarters is abuzz with gossip about talented new rookies Yuma and Chika. But it’s Osamu who attracts the most attention when an A-Rank agent challenges him to a duel. Then it’s Yuma’s turn to fight when another A-Rank agent challenges him! Plus there’s that meeting with Border’s top brass that they just got called to… Is there such a thing as too grand an introduction?

The exam to determine who gets to be on the away team begins, and the challenges facing Tamakoma-2 and the other squads selected to participate are piling up fast! All of the squads are split up into new teams and assigned captains of varying skill and experience. The teams are then sent to live aboard a simulated away-mission ship where they must complete a series of individual and group tests. With Tamakoma-2 split up, Osamu loses the support of his stronger and more skilled squad member...

The final match of the B-Rank Wars is coming up, and while some of the competition looks familiar, an unfamiliar squad is thrown into the mix—Yuba Squad. While Osamu and Yuma go to scout them out, Hyuse and the rest of Tamakoma help Chika come to terms with her insecurities and get to the root of her inability to shoot people. With the match looming, will Tamakoma-2 be able to pull it together in time to go up against new and old foes?!

The away mission test heads into Day 3! Osamu and the rest of Suwa’s Squad 7 are struggling to handle the additional units in the battle-sim exercises, yet they’re managing to move up in the overall ranks. But what will they do when their ace, Katori, slips into a sudden, debilitating funk?!

The Rank Wars is racing towards a conclusion as the final squads battle to determine their final rankings. Katori is as difficult to deal with as ever, and her squadmate Wakamura is having none of it. But mid fight, Katori suddenly tells Wakamura that he gets to call all of the shots. Will Wakamura be able to handle the pressure? And with the Rank Wars over, the Away Team selection exams are on the horizon. But first, Jin and Rindo need to have a little chat with a handful of familiar Neig...

It’s day two of the sealed environment phase of the away mission exam, and the examinees are diving into the demanding battle simulation, a strategy game that pits squad against squad! Unfortunately for Osamu and the rest of Suwa’s Squad 7, their first opponent is Mizukami’s Squad 9, which is already at the top of the test rankings. Does Suwa’s Squad 7 have any hope of clawing its way up from last place?

Yuma's Neighbor identity revealed, the Tamakoma branch safeguards Yuma, Osamu and Chika by recruiting them to their group of powerhouses and eccentrics. But Border headquarters wants Yuma’s Black Trigger badly enough to send agents from its top three squads to steal it!