Natsuo Ishidou has been physically gifted for as long as she can remember, yet she remains perpetually bored. Her knack for mastering any sport almost instantly has driven her to constantly seek out new challenges. However, since she rarely encounters anything difficult, she has developed a narcissistic and apathetic attitude toward those around her. One day, Natsuo witnesses a fellow student attempting to promote a mixed martial arts club. When the girl, Yuzuko Mawatari, singles Natsuo out from the crowd and extends an invitation, Natsuo becomes irritated by her demeanor and accepts the request, hoping to understand why Yuzuko appears so carefree. But as Natsuo participates in the mixed martial arts club, individuals from her past still hold grudges against her. Can she handle the consequences of her poor attitude while facing the challenge of someone who may actually be stronger than her?