Harmony

is a 2015 Japanese sci-fi anime film directed by Michael Arias and Takashi Nakamura, animated by Studio 4°C and based on the novel of the same name by Project Itoh. The film was released on November 13, 2015, followed by two other novel-based films by the same author: The Empire of Corpses and Genocidal Organ.

Plot
In the future, Utopia has finally been achieved thanks to medical nanotechnology and a powerful ethic of social welfare and mutual consideration. This perfect world isn't that perfect though, and three young girls stand up to totalitarian kindness and super-medicine by attempting suicide via starvation. It doesn't work, but one of the girls—Tuan Kirie—grows up to be a member of the World Health Organization. As a crisis threatens the harmony of the new world, Tuan rediscovers another member of her suicide pact, and together they must help save the planet...from itself.