Though not blood-related, Kingo and Kayano were raised together in an orphanage and serve as each other's closest family. When their hopes of adoption appear to be realized, their new parents reveal themselves to be Jinka! Just as Kingo is on the verge of being consumed, a Jinka blooms within Kayano... yet her Jinka is distinct. It makes no attempt to harm Kingo or other humans. Kingo strives to keep his sister's condition secret to prevent her from being pruned. One day, while serving as a low-ranking member of the Flower Funeral Forces, Kingo receives an alert regarding a Jinka near his apartment. He hurries to the location to find Kayano surrounded, and receives a bullet to the head for attempting to rescue her. Upon waking, he finds himself in a mysterious pruning facility, his sister is missing, and he is now infected by a Jinka himself—Kayano.