In the earlier series "Kite," the killer Sawa vanishes without a trace after avenging her parents' deaths, leaving her whereabouts unknown. Years later, a figure dances lightly on the dark side of a large city. She is an angel of death, killing her victims with grace before disappearing. Monaka is an ordinary high school student, yet this quiet and modest existence has a darker side. An angel of death is Monaka's other persona.