Amamiya Yuuhi, an average college student, wakes up one morning to the sight of Neu Crescent, a talking lizard claiming to be a knight. Neu asks for him to help save the world and protect their princess from an evil mage seeking to destroy the Earth, but Yuuhi finds it hard to believe such an absurd request. However, later that day a golem created by the evil mage appears before Yuuhi. Yuuhi is about to die when suddenly—

Yuuhi learns of the reason Samidare wishes to destroy the Earth, and he continues to train himself every day in order to hone his new powers. However, the "discipline" Yuuhi received from his grandfather continues to bind him like cursed chains. During that time, Yuuhi receives word from his home that his grandfather has fallen ill and been hospitalized—

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—

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