Kabe Mukou no Hanazono

A mysterious illness known as the "flower disease" is caused by strange flowers that take hold within the human body. Lazuli, a girl from a secluded region, lives in an area divided by a wall separating the "inside," a safe zone free from the flowers, and the "outside," where the flowers pose a constant danger. Seeking answers about her childhood friend, who entered the "inside" and did not return, Lazuli journeys into this protected area to uncover the truth.