The border defense organization "Border" was established to fight against the attacks of the "Neighbors" who possess unknown power. Osamu Mikumo, a member of the Border, forms the Mikumo Squad with Yuma Kuga, a Neighbor who he met by chance, and his childhood friend Chika Ametori, and they struggle to win the internal Border rankings in order to join the expeditionary force to the Neighborhood.
Episodes
Episode 1
The Attack
January 10, 202123m0.0
Aftkrator have ordered Galopoula to make Border stuck, so Galopoula's Expeditionary Force tries to break into Border HQ to destroy the ship for the expedition. Hyuse goes to meet them secretly in order to go back to his homeland.
Episode 2
Collision
January 17, 202123m0.0
Inside the Border HQ, the battles begin: Gatlin and Ratarikov v. 4 strong attackers near the dock, Wen So v. Nasu and Kumagai in a hall. Outside the HQ, the teams struggle with some drones that move like humans. Meanwhile, Jin is surprised that Yotaro follows Hyuse with Raijinmaru.
Episode 3
Battle
January 24, 202123m0.0
Border and Galopoula's Expeditionary Force play mind games reading each other's thoughts while fighting. Reghindetz is frustrated that his diversionary plan is not working.
Episode 4
Destiny
January 31, 202123m0.0
Border fights off the enemy one by one, but Gatlin and Ratarikov have no intention of giving up on completing their mission. Hyuse talks to Reghindetz, and Yotaro finally catches up with him.
Episode 5
New Technique
February 7, 202123m0.0
About the time Jin brought Hyuse into Border HQ, Tamakoma Second started the match against Katori Unit and Kakizaki Unit. Osamu and Chika support Yuma with their new techniques, and try to create momentum.
Episode 6
Strong Will
February 21, 202123m0.0
Chika starts destroying buildings outside the area where Osamu has set the trap. When Yuma puts Kakizaki Unit in a corner, Kakizaki remembers his past and tries to fight back against Yuma with strong will.
Episode 7
Showdown
February 28, 202123m0.0
Fumika Teruya prioritizes getting to Chika. Yoko Katori recalls the day her and Hana's fate changed as she fights against Osamu.
Episode 8
Negotiation
March 7, 202123m0.0
The match was over. A party is held at the Tamakoma branch to celebrate their victory, and then Hyuse offers himself to join their team as the second attacker until he arrives in Aftkrator. Tamakoma Second accepts his proposal and Osamu begins negotiation with the higher-ups of Border.
Episode 9
Captain
March 14, 202123m0.0
Osamu negotiates with higher-ups to get permission to include Hyuse in his team. Instead of allowing it, Commander Kido tells them that he is going to let Chika join the expedition force, regardless of their rank in the rank battles.
Episode 10
The Upper Rank
March 21, 202123m0.0
Tamakoma Second fights in a match against Oji Unit and Ikoma Unit. They have only three matches left, and need to be in the top two. Meanwhile, Hyuse attends the Border enlistment ceremony.
Episode 11
The strong ones
March 28, 202123m0.0
Yuma attacks Oji Unit. Besides, Ikoma and Mizukami catch up with them and Ikoma uses his special technique to strike them a hard blow. At a disadvantage, what are Oji unit's next tactics?
Episode 12
Rookie
April 4, 202123m0.0
Yuma, Oji and Ikoma fight each other fiercely while the battle between the snipers comes to an end. Later, Hyuse shows Border agents that he is highly skilled in the use of sword to be considered a rookie.