Kouai Seiga, who believes in easily obtaining what she desires, declares her challenge to the top pair! She devises a strategy to exploit the weaknesses of the student council president, Hitsugi Tenchi. Meanwhile, Hitsugi, who trusts in her own strength, prepares for the confrontation alongside her blade friend, Shizuku Miyamoto. With the entire academy watching, the long-awaited showdown begins! The clash of S-rank opponents, what will be the outcome――!?