Angelic Syndrome

On her 12th birthday, Angele is infected with the strange and fatal disease that causes feathers to sprout from the body. She is sent to a solitary institution to be quarantined where she meets a man named Hakana and the wheels of fate begin to turn. --- Based on the free game from Niconico. - (https://game.nicovideo.jp/atsumaru/games/gm4581) - (https://www.youtube.com/watch?v=wFmcgB3bikM)