Aira, the beautiful and popular high school student, picked up one of Okarun's “balls” without knowing what it was. Since then, she has become capable of perceiving paranormal phenomena and believes she is entrusted with a sacred mission. She sets a trap for Momo, convinced that Momo is a demon that must be eliminated. But her plan is quickly thwarted when a spirit appears and targets her specifically. Who is this “silky-haired acrobat” and why is she targeting Aira?!