World trigger

Osamu has less than sixteen minutes to safely deliver Chika, who's been cubified, to HQ, but he may not make it in time.

As the Neighbor invasion continues, Osamu's brave defense of Chika lands him in combat against the Neighbor commander.

Border is abuzz with gossip about Tamakoma's new recruits, Osamu and Yuma, who attract so much attention that top A-rank agents challenge them to duels.

With only seven seconds left until the crossroads, Black Triggers face off as Miwa activates Fujin to bring the invasion to an end.

Having fought their way into the top 8-Rank group, Tamakoma-2 gets to battle for a chance to make A-Rank.

Trion soldiers swarm Mikado City, wreaking havoc and capturing isolated Border agents, so when the sinister humanoid Neighbors orchestrating the attack target Chika for her massive Trion, Osamu may be the only one who can save her.

Osamu, Yuma and Chika, aka. Tamakoma-2 Squad intend to find thirty-two agents who went missing during the alien invasion, but first they need to rank-up through the Rank Wars and must prepare to face-off against Arafune and Suwa squads.

With strange Triggers that defy explanation, the Neighbors make quick work of Border's top agents until they start to fight smart.

After being crushed in their last Rank Wars match and Jin refusing Osamu's request to join their squad, Tamakoma-2 is at a loss, Osamu is determined to learn how to fight with his team using his limited Trion, and gets help from an unexpected source, but with a prediction of another invasion looming overheard, training may have to wait.

After defeating Arafune and Suwa squads in the Rank Wars, Tamakoma-2 settles into the middle 8-Rank group and prepare for their next match, this time gainst the infamous Suzunari-1 and the all-female Nasu Squad, both of which have their own ace attackers.