Sunao Sato, who runs the studio following the wishes of her parents, who was a master of social dance, was spending days with her sister Hazuki (Sorami Imura) and her partner Ryosuke (Katsuno Yosuke). .. One day, Keiji (Koji Furukawa), whose partner was refused in Hazuki, attacks her, and Ryosuke, who happens to pass by accident, saves Hazuki ....