Killing Angels is a cartoon work created by Japanese cartoonist Fujimoto Tree, which was later adapted into animation, movies and other forms. This work has a certain fan base in Japan and abroad, which can be said to be one of the more popular works.
Killing Angels is a special animation, adapted from the original game, which tells the story of Zach, an adult male, and Yi Rui, a girl aged 13. Their emotional bond turned out to be a "kill me" agreement.