Cuando Yuuhi despierta en su casa y un lagarto comienza a hablarle y a decirle que es un caballero que ha venido para salvar el mundo, así como que necesita su ayuda, Yuuhi lo tiene claro: el estrés está haciendo que pierda la cabeza.

Yuuhi ha cedido por completo ante Samidare y se convierte en su caballero, así que intenta dominar el poder que tiene, y comienza intentando ganar resistencia física.

Yuuhi recibe la noticia de que su abuelo está en el hospital, y cuando este va a visitarlo, dudando, lo que le dice su abuelo es algo que no esperaba.

Yuuhi and Samidare meet the Dog Knight, Shinonome Hangetsu and grow closer to him, but Yuuhi grows very wary after watching him easily defeat a golem by himself with his power. Meanwhile, Samidare's father returns as Hangetsu is making moves on Hisame. After interacting with several kinds of "adults", Yuuhi recalls his dead father—

Yuuhi and the others celebrate Samidare's birthday and enjoy a moment of peace and calm, but Yuuhi also learns that Samidare is truly ill, and she's only able to be active now thanks to the Spirit, Anima. So once their battle is over Samidare's days will be numbered once more. Yuuhi finally tells Shinonome Hangetsu that he wants to become stronger, and Hangetsu agrees to help. Then Hangetsu begins to speak about his own past—

Yuuhi struggles to cope with Hangetsu's death and actually fight as new Beast Knights appear before him and Samidare, and band together to face the next golems.

Hangetsu's wish has both made Yuuhi stronger and made him a target for Mikazuki while the rest of the Beast Knights are brought together.

With the survivng ten Beast Knights now united, Yuuhi learns of Nagumo's past as a detective while Shimaki converses with Animus in his dreams.

Yuuhi digs up a box buried in the mountains that contains a letter and a book for him which describes the life of the clairvoyant Swordfish Knight, Akitani Inatika.

Samidare and Yuuhi help training Tarou and Hanako, however, there doesn't seems to be any progress. Mikazuki calls Yuuhi and tells him that its summer and that is associated with beaches and swimsuits, and that they should held a training camp.

Samidare runs away from home to avoid her Mom, so Yuuhi is forced to live with the Asahina family while she stays at his apartment.

The Spirit, Anima, appears and gathers the Beast Knights together to transform Dance Dark into the Mythic Beast Knight, Unicorn, leaving the knights to face a new golem without Samidare once more.

Tarou has always been worried about Hanako after her wish made her more likely die, and when the Beast Knights struggle against the ninth golem, he rises up to protect her.

The eleven-eyed, shapeshifting golem appears before the Beast Knights as they grieve their loss of Kusakabe Tarou, and they gather forces to avenge him.

Mikazuki introduces Yuuhi to the job he inherited from Hangetsu, and after reminiscing about him, they agree to duel.

Subaru and Yukimachi recall their wish and their meeting with their Beast Squires while Taiyou grows closer to the eleventh golem, Maimakterion.

Pyanepsion and Maimakterion, the tenth and eleventh golem, fight together to corner the Beast Kngihts before being driven off and Taiyou finds himself opening up to the older Knights.

Shimaki struggles to create his next golem, and Yuuhi must face Anima's trial after dealing with the death of his grandfather.

Anima and Animus were the sole survivors of a space shuttle accident in the distant future, but their secret leads to the battle over Earth's destruction, and after many years Anima finally meets the young Yuuhi and Samidare.

The Beast Knights face Animus and his final golem in the last battle as the Biscuit Hammer finally activates.

Samidare has shattered the Biscuit Hammer and the battle between Animus and the Beast Knights begins.

Samidare declares her intent to destroy the Earth and Yuuhi fights to protect Samidare as the Beast Knights fight to stop the destruction of the planet.

The Beast Knights bid farewell to their squires and go their separate ways before meeting up once again some time later in the future.