Tōya, a vampire bound by duty, fights alongside Kanata and allies to shield Old Tokyo from collapse and reunite the fractured city. His younger sister, Yūna, stands with him in their coalition, their combined efforts pivotal to navigating the perilous divide between the skyborne ruins of Old Tokyo and the earthbound sprawl of New Tokyo. Tasked with confronting supernatural threats, Tōya channels his vampiric lineage in combat, wielding innate abilities to fortify the group’s strategies. Through calculated decisions and unwavering collaboration, he aids their shared goal to stabilize the dual cities before catastrophe severs them irrevocably.