Kohinata Minoru chooses to major in a college renowned for its athletic programs, and spends his time participating in gymnastics alongside his friend Nana. Unfortunately, Minoru's skill draws negative attention from some of the more experienced gymnasts who begin to harass him. One night, upheaval ensues when Mutou Ryuuji, a karate practitioner, witnesses their bullying and steps in. Rather than defending Minoru, however, Ryuuji introduces him to the world of karate. Soon, Minoru falls in with a new crew, exposing their discordant pasts and uncovering a shocking revelation about their motivation for vengeance.
