In a world ravaged by a zombie pandemic, Mikoto Amano awakens in an unknown location with no memories. She finds refuge with six girls: Ranna, Lili, Yuu, Fumika, Murumuru, and Rumina. Their tranquil existence is abruptly disrupted when a shocking event unfolds—the brutal murder of the man rescued alongside Mikoto. The killer is among them, and anyone could be the next target.
Set in the isolated Tokyu Kabukicho Tower, the story unravels within this high-rise filled with lurking mysteries and secrets. As the girls begin to forge friendships, will they be able to uncover the truth behind the horrific incident?