Ashihara, Daisuke

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.

Determined to protect life on Earth and the identity of his Neighbor friend Yuma from Border, Osamu Mikumo soon learns that Border has ways of finding the traitors in their midst.

Yuma's Neighbor idenity revealed, the Tamakoma branch safeguards him, Osamu and Chika by recruiting them to their group of powerhouses and eccentrics, but Border HQ wants Yuma's black trigger badily enough to send agents from its top three squads to steal it.

With the Earth under a constant threat from the Neighbors, invincible monsters from a different dimension, Border agent Osamu Mikumo, determined to protect the planet, finds his beliefs challenged when he meets the fiesty humanoid Neighbor Yuma.

"A gate to another dimension has burst open, and invincible monsters called Neighbors invade Earth. Osamu Mikumo may not be the best among the elite warriors who co-opt other-dimensional technology to fight back, but along with his Neighbor friend Yuma, he'll do whatever it takes to defend life on Earth as we know it"--OCLC.

"Should Border admit a Neighbor into ranks? Jin and Arashiyama Squad think so, and they clash against headquarters' top agents to preserve Yuma's right to enlist. After a brutal fight against his friends and peers, Jin makes an unimaginable sacrifice to put an end to the hostility and protect Yuma's future at Border"--Back cover.