Imagine a modern day where the Sword Abolishment Edict of the Meiji period was never enacted. The descendants of samurai are allowed to carry swords, and they gather at the famous boys' high school Shiseikan. Among them is the antisocial 10th-grade swordsman, Haruma Konkonoe. The poor swordsman, Ibuki Takahara, has transferred to Haruma's class. Their fateful encounter will slowly melt Haruma's cold, hardened heart.