In a world ravaged by a zombie outbreak, the main character Mikoto Amano awakens in an unknown location with no recollection. She is sheltered by six girls—Ranna, Lili, Yuu, Fumika, Murumuru, and Rumina. Their tranquil existence is abruptly disrupted when a startling event transpires: the man rescued with Mikoto is mercilessly killed. The murderer hides among them, and anyone could be the next victim...
The plot takes place inside Tokyu Kabukicho Tower, a now sealed skyscraper where enigmas and betrayals emerge one by one. As the girls forge new friendships, can they unveil the truth behind the tragedy?
