Kengo, Yuuki, and Gentaro are forced to take supplementary lessons on a Sunday due to missing classes whilst defeating Zodiarts. Meanwhile, Shun grows angry with the Kamen Rider Club and Miu's involvement with them. JK and Miu try and hold down the fort whilst the others are in class.

Gentaro, Miu, JK, and Yuuki continue to track down the Hound Zodiarts, and Shun decides it's time to make his own choices about his friends and school activities.

With Kengo's death at the hands of Sagittarius Nova and the destruction of the Rabbit Hatch, a distraught Kamen Rider Club reads the final letter from the Core Child written before his death. A resolved duo of Riders must face the Horoscopes one last time to avenge their fallen friend and stop the Day of Awakening for good.