Kris met the Maknae of the guardian angels. She is a beautiful, heavenly angel, however she always creates accidents and careless mistakes. Kai is the angel of death, responsible of taking the souls of people who attempts suicide. He may seem emotionless because he is afraid to show his true, good feelings. Due to a mistake made by the clumsy guardian angel, they must remain to Earth for 100 days, Kris' angel trying to keep him alive while Kai plagues Kris of guilt and induces him to kill himself.