World TriggerA 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.
WriterHiroyuki Yoshino
Visitor from the Other World
Oct 5, 2014
Approximately four years ago, a gate to another world opened in Mikado City, and invaders called Neighbors appeared.
Neighbor and Trion Soldier
Oct 12, 2014
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
Oct 19, 2014
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
Nov 2, 2014
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
Nov 9, 2014
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
Nov 16, 2014
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
Nov 23, 2014
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
Nov 30, 2014
A-rank agents Shuji Miwa and Yosuke Yoneya make an assault on Yuma without even asking what happened. Osamu calls Jin to help.
The Organization Known as Border
Dec 7, 2014
With Shuji's squad singlehandedly defeated, the Border Agency's executives order Yuichi to defeat Yuma and recover the Black Trigger. Osamu worries about Yuichi's impending clash, while a secret hidden by Yuma is slowly exposed.
Tamakoma Branch
Dec 14, 2014
Jin encourages Yuma to join the Tamakoma branch. Yuma accepts it if he can team up with Osamu and Chika.
The Determination of Each One
Dec 21, 2014
Osamu hears from Replica about why Yuma came to this world, and from Chika about her true feelings.
A-Rank Agents of Tamakoma
Dec 28, 2014
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.
Border Top Team
Jan 11, 2015
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.
Miwa Corps
Jan 18, 2015
The battle between the A-Rank attack unit and Yuichi Jin begins to rage. In the face of top-level agents, Yuichi tries to turn it into a test of endurance. But just as Shiro Kikuchihara gets by him, Yuichi's Black Trigger goes off!
Black Trigger Wind Blade
Jan 25, 2015
Yuichi finally reveals his "Wind Blade" technique with the Black Trigger. As his battle with A-Rank vets Kei and Soya reaches its climax, the Arashiyama Unit shows up in support and clashes with the Miwa Unit. Who will emerge victorious?!
To the Future
Feb 8, 2015
Yuichi Jin and the Arashiyama Unit repel the enemy. Receiving news of their elite squad's defeat, the Border Agency's headquarters starts to get nervous.
Border Official Enlistment
Feb 15, 2015
The day of Yuma and Chika's initiation into the Border Agency arrives. Osamu nervously stands by in support, while they draw the scrutiny of their new peers. At that time,
Mikumo Shu VS Kazama Souya
Feb 22, 2015
Osamu readies for his practice fight against Soya Kazama. Soya is a symbol of overwhelming strength, while Osamu has yet to land a hit in over twenty battles!
Ranking Battle! Midorikawa Jun's Strategy
Mar 1, 2015
Osamu doesn't know how to deal with his new reputation as "the guy who tied with Soya Kazama". He is soon challenged by one of his fellow agents to a Rank War.
Duel! Yuma VS Midorikawa
Mar 8, 2015
Yuma and Shun Midorikawa's fight begins. Yuma quietly rages over Shun's humiliating public defeat of Osamu. How will he fight against the A-rank vet? Meanwhile, Commander Kido convenes a meeting to prepare for the forecast massive Neighbor invasion.
Neighbor's World
Mar 15, 2015
The Border brass puts together a strategy based on Replica's information about Neighborhood. Meanwhile, Yuichi Jin senses impending danger for Osamu and asks Shuji Miwa for help. A massive battle with the Neighbors is about to begin in Mikado City!
A Large-Scale Invasion Starts
Mar 22, 2015
The Neighbors' large-scale invasion finally begins. The invading army of Trion soldierrs is countered with a defense strategy. Just as the battle seems to turn in Border's favor, a new Trion soldier, Rabbit, emerges from a defeated Bamster!
The Holy Land, AftoKrator
Mar 29, 2015
Border seeks a way to counter the new Trion soldier, Rabbit. Yuma prevents Trion soldiers from infiltrating the city, but is mistaken for the enemy and attacked by the B-rank Chano Unit. Meanwhile, an Ilgar Trion Soldier menaces Border headquarters!
Nestling from Mysterious World
Apr 5, 2015
Trion soldiers from Aftokrator appear all over Mikado City. Border is forced to divide its forces to deal with their numbers. Chika's C-rank unit is attacked while organizing the civilian evacuation. What is Aftokrator's true goal?
Best Force in Border
Apr 12, 2015
The C-rank units are revealed to be the true target. The battle intensifies as Hyrein sends humanoid Neighbors Enedora and Ranbanein into combat. Osamu fights to give the C-ranks a chance to escape, but Rabbit's merciless attack on Chika continues!
Fierce Fight! Enedora vs. Kazama Squad
Apr 19, 2015
Aftokrator's humanoid Neighbors are unveiled. These so-called Horn Triggers overwhelm the Border agents with powerful Triggers! The A-rank Kazama Unit uses Kikuchihara's Side Effect in a skillful combo play against Enedora, but will their luck continue?
Counterattack of Border
Apr 26, 2015
Kizaki, Karauma and Konami fight the sinister Hyuse and Viza so that Osamu and Chika can escape. Meanwhile, Ranbanein easily defeats Chano unit and takes on Yoneya, Izumi, Midorikawa and Azuma's combined forces. Can Jin's worst case scenario be prevented?
Star Wand Master
May 3, 2015
Kizaki has figured out Hyuse's Trigger, Lambiris. He orders Karasuma and Konami to protect the city while he holds off Hyuse and Viza.
Crossroads of Destiny
May 10, 2015
Viza and Hyuse continue to pursue Chika, but Yuma and Jin arrive just in time. Yuma faces off against Viza while Jin battles Hyuse. Osamu and Karasuma lead Chika and the C-rank agents to Border HQ. However, Enedora's rampage has the HQ in chaos!
Enemy Commander High Rain
May 17, 2015
Suwa unit traps Enedora in a virtual training room. Director Shinoda goes to offer them back-up, and the tides begin to turn for Border. Mira's 7 Rabits block the evacuees led by Osamu, as the Aftokrator leader Hyrein heads out to capture Chika!
Mikumo Osamu's Consciousness
May 24, 2015
Hyrein's attack turns Chika into a cube. Osamu blames himself, but is inspired by his fellow Border agents to race for Border HQ in an attempt to save Chika
Implacable Enedora
May 31, 2015
Director Shinoda corners Enedora in the virtual training room. However, Enedora's powerful Black Trigger attack are more than a match for the Border agents' group attacks. Meanwhile, Karasuma faces Hyrein and activates his true power, Geist!
The Terror of Hyrein
Jun 7, 2015
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.
A Fierce Showdown! The Fight of the Best
Jun 14, 2015
Miwa uses a trigger Lead Bullet against Hairein. Meanwhile, Yuma decides to carry out a desperate attack against Viza.
The End of the Battle
Jun 21, 2015
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!
The Have-not
Jun 28, 2015
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.
A Hero and a Partner
Jul 5, 2015
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.
B-Rank Wars Begin
Jul 19, 2015
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.
Suwa Squad and Arafune Squad
Jul 26, 2015
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.
Setting off! Mikumo Squad
Aug 2, 2015
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.
An Impertinent Rookie
Aug 9, 2015
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.
Ko Murakami of Suzunari-1
Aug 16, 2015
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.
Nasu Squad's Choice
Aug 23, 2015
Murakami's side effect is especially troublesome issue. Osamu thinks about how to prepare for the next Rank Battle.
The Battle in the Foul Weather
Aug 30, 2015
The Rank Battle started. Nasu Unit takes tactical actions as planned in the storm. However, Chika's sniping changes the whole situation.
The Thing That Decides the Battle
Sep 6, 2015
The agents have been divided into east and west across the river. On the west side, a three-way battle between the attackers begins.
The Ace's Willpower
Sep 20, 2015
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.
The Captain's Pride
Sep 27, 2015
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.
And Towards the Future
Oct 4, 2015
Mikumo Squad joins the B-rank upper tier. The fight against the top B-rank squads will be a touchstone for promotion to A-rank. Anticipating this, Osamu struggles with his inability to score a single point on his own and comes to a conclusion.
Fugitives from Another World
Oct 11, 2015
Start of World Trigger new arc, Toubousha-hen. Unknown Trion soldiers show up at Border HQ. Jin and Tachikawa take them on.
Invisible Assailants
Oct 18, 2015
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!
Xeno's Trion Soldiers
Oct 25, 2015
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?
The Sunset of Meeden
Nov 1, 2015
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.
The One that Shall Be Saved
Nov 8, 2015
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.
Giev's Thrust
Nov 15, 2015
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.
Dead or Alive
Nov 22, 2015
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.
The Secret of Lilith
Nov 29, 2015
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.
Xeno and Lilith
Dec 6, 2015
Lilith reveals her true power in order to save Xeno and Yuma.
The Captured Osamu
Dec 13, 2015
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.
The Two Black Triggers
Dec 20, 2015
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.
The Adventure of Yotaro
Dec 27, 2015
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.
Truth and Lies
Jan 10, 2016
Gieve and Charon begin their attack on Yuma.
Giev and Charon
Jan 17, 2016
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.
A Reversed Future
Jan 24, 2016
Xeno's hand cuts thin air, and monster Gieve takes in Lilith and takes on a grotesque form.
A Prisoner from Aftokrator
Jan 31, 2016
Soon after meeting and parting with Xeno and Lilith, Yuma, Osamu and Chika begin preparing for their promotion battle.
No.1 Shooter, Masataka Ninomiya
Feb 7, 2016
Aftokrator's Black Trigger user, Enedora, is alive! Enedora sheds new light on the Large Scale Invasion and the reason that Chika was targeted. Meanwhile, B-Rank No. 1 team leader Ninomiya approaches Osamu and Chika. Osamu makes a tough decision.
Sharpened Fangs
Feb 14, 2016
Tamakoma-2 starts individual training in preparation for the B-Rank rank wars. Osamu visits Arashiyama for shooter training. Chika meets a young boy during group sniper training. Yuuma meets Kageura, an agent that No. 4 attacker Murakami has never beaten.
The Battle of the B-Rank Top Teams
Feb 21, 2016
During their brief encounter, Yuuma senses Kageura's limitless skill. Osamu receives shooter training from Arashiyama and Izumi, allowing him to truly contribute to the team. If they win, Mikumo Squad's promotion to A-Rank could become a reality.
The Targeted Tamakoma
Feb 28, 2016
Ninomiya Squad, Kageura Squad, Azuma Squad and Mikumo Squad face off! As tensions mount, each team targets Osamu and closes in. Meanwhile, the two strongest B-Rank agents, Ninomiya and Kageura, assess the situation. Can Mikumo Squad survive the onslaught?
A Battle Royal
Mar 6, 2016
Osamu is quickly knocked out of combat by Azuma, former leader of an A-Rank No. 1 team. Chika tries to overcome her inability to fire on humans, but her sniping reveals her location. Meanwhile, Yuuma enters a battle royal against 5 Attackers.
A Captain's Duty
Mar 13, 2016
Yuuma faces Kageura. Ninomiya takes advantage of this to attack them both. After the battle, Osamu is devastated by his defeat. Kazama's advice leads him to make a major decision for the sake of the team, just as a new threat approaches Mikado City.
A New Threat
Mar 20, 2016
Shinoda announces an imminent invasion by a new Neighbor country. Tachikawa and Kazama Squad are assigned to deal with the threat, based on Jin's predictions. Osamu follows Jin's suggestion to add a new member to Mikumo Squad.
An Evolving Mikumo Squad
Mar 27, 2016
After the Rank Wars against the B-Rank upper tier squads, Mikumo Squad tries to up their game. Yuzuru gives Chika an idea for overcoming her weaknesses, and Osamu gathers information about Hyuse, while an A-Rank Team leader tries to headhunt Yuuma.
To the Future
Apr 3, 2016
Osamu continues to try to improve himself, Chika confronts her faults, and Yuuma has faith in them. Mikumo Squad's losses in the B-Rank Rank Wars motivate them further. As a new Neighbor invasion of Border HQ begins, can they open a path to the future?
