The headquarters of the Border Defense Agency are currently hosting the B-Rank Wars where teams are battling it out for a chance to participate in the upcoming Away Mission. Tamakoma-2, including Osamu Mikumo, has made it through till now but the final rounds demand them to surpass their current capabilities. However, the squad receives a boost from a skilled new member and starts training with fresh strategies. Yet, a heated dispute disrupts their progress and puts their pass to the Neighbor's realm at risk.