S1 • E1
A gate to another dimension was burst open in Mikado City, and Neighbors started to invade our world. However, a mysterious organization, Border, fought them off using the Neighbors' technology called "Triggers". They'd been preparing for this day for a long time. 4 years have passed since then, a schoolboy named Yuma Kuga has transferred to Osamu Mikumo's class.
S1 • E2
Miwa Unit is confused because they find a large enemy drone that has already been destroyed. Meanwhile, Yuma tells Osamu that he came from Neighbor world.
S1 • E3
A gate opens at Osamu's middle school even though it's inside the security zone, and an enemy drone storms in. Osamu tries to fight it off, knowing that he is not strong enough.
S1 • E4
Osamu defends Yuma, claiming that he alone defeated the enemy drone. An A-rank agent Ai Kitora criticizes him for breaking their rules.
S1 • E5
A giant enemy drone appeared, and flies in circles over the city while dropping bombs. Will Kitora able to destroy it?
S1 • E6
The higher-ups of Border order a S-rank agent Yuichi Jin to find out why the unpredictable gates appear in the city. Yuma follows Replica's advice.
S1 • E7
Osamu has known that his friend Chika Amatori has something to attract Neighbors. She doesn't want to get anyone involved ever since she lost her brother and one of her friends. Yuma tells them why the Neighbors would come to this world.
S1 • E8
A-rank agents Shuji Miwa and Yosuke Yoneya make an assault on Yuma without even asking what happened. Osamu calls Jin to help.
S1 • E9
The higher-ups of Border disagreed on how to treat Yuma. The highest person in charge, Commander Kido orders Jin to kill Yuma and bring his black trigger to the headquarters.
S1 • E10
Jin encourages Yuma to join the Tamakoma branch. Yuma accepts it if he can team up with Osamu and Chika.
S1 • E11
Osamu hears from Replica about why Yuma came to this world, and from Chika about her true feelings.
S1 • E12
Osamu, Yuma and Chika decide to join Tamakoma branch to go to Neighbor world as A-rank agents of the expedition force. They go into rigorous training from Tamakoma First Unit in order to become A-rank agents.
S1 • E13
Commander Kido fears that Tamakoma branch will become too powerful. He orders A-rank agents who belong to the headquarters to take Yuma's black trigger.
S1 • E14
Jin fights against A-rank agents led by the number one attacker Kei Tachikawa. He finally uses his black trigger Fu-jin.
S1 • E15
The battle between Jin and A-rank agents is fierce. Arashiyama Unit receives directions from their superior Shinoda, and covers Jin.
S1 • E16
Commander Kido was shocked to hear the report that Jin beat the A-rank agents. And then, Jin shows up in the headquarters and offers him a big deal.
S1 • E17
Yuma and Chika are officially enlisted in Border. They become famous by their own skills. Meanwhile, an A-rank attacker Soya Kazama challenges Osamu to a solo match.
S1 • E18
Osamu fought against Kazama in over 20 solo matches, but never won a single one. What Kazama said motivates him, and they fight a match again.
S1 • E19
Rumors spread that Osamu and Kazama drew their match, that makes Osamu uncomfortable. An A-rank attacker Shun Midorikawa intentionally gathers an audience and challenges Osamu to a solo match in front of them.
S1 • E20
Yuma and Midorikawa start to fight 10 solo matches. Yuma noticed his malice towards Osamu and ready to fight. Meanwhile, Commander Kido holds a meeting to prepare for the expected major invasion from Neighbor world.
S1 • E21
Border formulates a strategy against the enemy invasion based on the information they receive from Replica. Jin foresees Osamu's danger in near the future through his own side effect, and he asks Miwa for help.
S1 • E22
One of Neighbors' countries, Aftkrator finally starts to invade Mikado city. They put new drones on the battlefield.
S1 • E23
Border has their hands full with the enemy's new drones. When Yuma fights against them, Chano Unit mistakes him as an enemy soldier and shoot him.
S1 • E24
Aftkrator has a strategy to divide Border's force. The drones begin to attack C-rank agents including Chika who are evacuating citizens from a war zone.
S1 • E25
The enemy's purpose is to kidnap C-rank agents to get a biological power Trion that Kitora revealed. The enemy's leader Hairein decided to bring in his soldiers Enedra, Lamvanein, Hyuse and Viza. Osamu and Chika are in danger, but the strongest unit in Border comes to their rescue!
S1 • E26
Kazama Unit struggles with Enedra because he uses a black trigger Vorvoros.
S1 • E27
Tamakoma First Unit fights against Hyuse and Viza to help C-rank agents including Osamu and Chika to flee to the HQ. Meanwhile, a joint team made up of several units fights against Lamvanein.
S1 • E28
The leader of Tamakoma First, Reiji Kizaki orders his teammates Kyosuke "Torimaru" Karasuma and Kirie Konami to save people, and confronts the enemy alone. Viza recognizes him as an excellent soldier and uses his black trigger Organon.
S1 • E29
Hyuse and Viza chased after Chika, but Jin and Yuma catch up with them and block their path. Osamu and Karasuma try to take Chika and C-rank agents to the HQ. Meanwhile, the HQ has been invaded by Enedra.
S1 • E30
Suwa Unit fights against Enedra by locking him in a virtual training room that made of Trion because they can analyze his weakness as they are fighting. Meanwhile, Hairein finally appears in front of Chika.
S1 • E31
Hairein has turned Chika into a Trion cube using his trigger. Osamu takes it, and heads for the HQ. Meanwhile, Shinoda tries to join the battle against Enedra.
S1 • E32
Shinoda fights against Enedra. How will he counter his Vorvoros?
S1 • E33
Karasuma uses his personal trigger Geist against Hairein. He can gain strength and speed, but he has only 200 seconds left to be able to fight.
S1 • E34
Miwa uses a trigger Lead Bullet against Hairein. Meanwhile, Yuma decides to carry out a desperate attack against Viza.
S1 • E35
Yuma defeated Viza, but he has a few Trion left. Miwa was moved away from Osamu by Mira's trigger. Now there are only seven seconds left until the turning point of the future!
S1 • E36
Aftkrator withdrew from our world and the 2nd large-scale invasion is over. Although Chika was saved, Osamu lost conscious. Osamu remembers why he joined Border in his dream.
S1 • E37
Osamu becomes conscious, and talks with Yuma after hearing the situation from his mother and Chika. One of higher-ups Karasawa takes him to the press conference by Border.
S1 • E38
Many journalists ask the higher-ups of Border about responsibility for damage caused by the battle. Osamu hears about Netsuki's plan from Karasawa, and then he steps forward in front of the journalists and speaks his thoughts.
S1 • E39
Yuma and Chika won their first Rank Battle as Tamakoma Second Unit in front of injured Osamu. Their next opponents are the 8th place, Suwa Unit, and the 10th place, Arafune Unit. Osamu can't decide what tactics to use against them.
S1 • E40
Osamu recovered and rejoined his unit. Tamakoma Second had the right to choose the location this time, and they chose an urban stage with difference of elevation that snipers like.
S1 • E41
The match seemed that it would favor the unit with the most snipers, but Arafune Unit is being driven into a corner by rest of two units. Arafune used to be an attacker, so he launches an attack on Yuma, with a sword type trigger Kogetsu.
S1 • E42
Tamakoma Second's next opponents are the 13th place, Nasu Unit, and the 9th place, Suzunari First Unit. Yuma gets a chance to challenge the attacker of Suzunari First, Kou Murakami to a solo match.
S1 • E43
Murakami's side effect is especially troublesome issue. Osamu thinks about how to prepare for the next Rank Battle.
S1 • E44
The Rank Battle started. Nasu Unit takes tactical actions as planned in the storm. However, Chika's sniping changes the whole situation.
S1 • E45
The agents have been divided into east and west across the river. On the west side, a three-way battle between the attackers begins.
S1 • E46
On the east side, Kuruma and Betsuyaku are at the mercy of Nasu's shooting. Osamu doesn't want them to be defeated faster than him, so he support them. On the west side, Yuma enjoys fighting with Murakami.
S1 • E47
Chika breaks the bank of the river by her sniping, and draws the water into the city. Osamu wants Yuma to join him as soon as possible.
S1 • E48
Tamakoma Second Unit made it to the top group in B-rank. However, Osamu worries that he has scored only one point on his own in the battles.
S1 • E49
Unknown Trion soldiers show up at Border HQ. Jin and Tachikawa take them on.
S1 • E50
Zeno, a refugee from Elgates, begs Yuma and Osamu to harbor Lilith and him during their stay in this world. With Chika taken hostage, Osamu and Yuma have no choice but to agree. As they return to the Shizuka City retreat, an unseen assassin strikes!
S1 • E51
Kazama Squad heads into combat as Gojima City is attacked by new Trion soldiers. Osamu tries to befriend Zeno and Lilith. Zeno offers to reveal his past, if Osamu will agree to a one-on-one fight. How far will he go to learn the truth about Elgates?
S1 • E52
Despite Lilith's best efforts, she can't hide her loneliness. Chika and Osamu work with Kitora and Midorikawa to try and cheer her up. At that moment, Karon and Gieve make their move, commanding Trion soldiers with special abilities.
S1 • E53
While studying with Yoneya and Kodera, Miwa sees young siblings and is reminded of his past. The peace is shattered by an attack from Gieve's Spider-type Trion Soldiers.
S1 • E54
Zeno's devotion to Lilith leads him to treat Yuma and Chika like tools, enraging Osamu. Meanwhile, Gieve and Karon threaten Shizuka City with massive Trion soldiers! As Osamu's team joins Kitora in defending the city, Gieve isolates Osamu and Zeno.
S1 • E55
Arashiyama Squad gathers Border's aces! Arafune and Murakami join in the battle, destroying Gieve's Trion soldiers. But Gieve's plot to blow up Shizuka City using massive Trion soldiers proceeds. As Osamu comes up with a plan, Zeno takes his own action.
S1 • E56
Shiori takes Yuma, Osamu, and Chika on a relaxing trip to Shizuka Marine World with Zeno and Lilith. But the peace is interrupted by an attack by Gieve's powerful Trion soldiers. Lilith's body reaches its limit and begins to change, revealing her secret.
S1 • E57
Lilith reveals her true power in order to save Xeno and Yuma.
S1 • E58
Yuma, Chika and Xeno take the fight to the enemy in order to rescue Osamu. However, a cunning trap separates them, forcing Yuma into a one-on-one fight against Giev. A Trion soldier generates a mysterious virtual world where Yuma faces an unexpected foe.
S1 • E59
Zeno and Chika find Osamu, while Yuma continues his fight against Giev. He struggles against Giev and Charon's skillful coordination, so similar to what he had with Replica. At the same time, a new Trion soldier threatens Osamu, Chika and Xeno.
S1 • E60
Yotaro heads towards Shizuka City with Raijinmaru, hoping to catch up to Konami. He meets a troubled young girl named Cocoa and befriends her. As a violent fight between Border agents and Trion soldiers breaks out, Yotaro's true battle begins.
S1 • E61
Gieve and Charon begin their attack on Yuma.
S1 • E62
Giev's secret is revealed. Just like Lilith, he's a Humanoid Trion Soldier created by Lamia. Meanwhile, all of Shizuka City's citizens become Charon's hostages. Tachikawa, Kazama and other A-Rank Border agents gather in Shizuka City for the coming battle.
S1 • E63
Xeno's hand cuts thin air, and monster Gieve takes in Lilith and takes on a grotesque form.
S1 • E64
Osamu looks back at the Rank Battles they fought so far. Meanwhile, the higher-ups of Border summon Yuma and Hyuse to make a deal.
S1 • E65
An unexpected person reveals why Aftkrator invaded our world and needed Chika. Later, the number one shooter in B-rank Masataka Ninomiya visits Tamakoma Branch to ask Osamu and Chika some questions about her brother Rinji and his former teammate Hatohara. Osamu tells him what he knows.
S1 • E66
Osamu, Yuma and Chika begins to train hard in preparation for the next Rank Battle against the top units. Chika gets to know the sniper of Kageura Unit, Yuzuru Ema. Meanwhile, Murakami introduces Yuma to the attacker Masato Kageura.
S1 • E67
Yuma found Kageura to be a great attacker without fighting, he is a difficult opponent due to his side effect. Meanwhile, Arashiyama, Izumi, and Yuiga train Osamu to be a better shooter, so he grows in self-confidence.
S1 • E68
The Rank Battle started. Ninomiya Unit, Kageura Unit and Azuma Unit have their own good tactics that bother Tamakoma Second. Meanwhile, Hyuse and Jin make a big bet while watching the match on TV.
S1 • E69
Azuma's excellent sniping puts Tamakoma Second in a tight spot. Chika tries to overcome her weakness. Yuma is stuck in a battle with 4 attackers.
S1 • E70
Yuma fights a duel with Kageura, and Ninomiya attacks the two using the tracking bullets. Osamu thinks how to fulfill his duty as a leader after the battle.
S1 • E71
Commander Kido and Shinoda discuss the possibility of upcoming invasion with A-rank unit leaders. Border secretly forms defense teams consisting of several A-rank units based on Jin's prediction and the information from Enedra. Meanwhile, Osamu realizes who Jin suggested as a new member of Tamakoma Second.
S1 • E72
Ema invites Chika to Kageura Unit operation room and teaches her how to snipe using a trigger Lead Bullet. Osamu and Yuma learn more about Aftkrator and Hyuse from Enedra.
S1 • E73
Osamu learns how to use a trigger Spider from Kitora. Tamakoma Second continues to prepare for the next Rank Battle while a vassal state of Aftkrator, Galopoula, plans to attack the Border HQ.
Jun Arashiyama
Motokichi Kinuta
Youtarou Rindou
Kyosuke Karasuma
Kirie Konami
Soya Kazama
Ken Satori
Yuma Kuga
Yuko Kumagai
Hinoe