قسمت 1: یوهی آمامیا برای متوقف کردن نقشه‌های شیطانی پرنسس سامیداره آساهینا به یک شوالیه وحشی تبدیل می‌شود

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College student Yuuhi Amamiya awakens to a lizard in his room that calls itself Noi, a Beast Knight assisting a princess in saving the world. Believing he is hallucinating, Yuuhi simply throws the lizard away. Unfortunately, Noi keeps reappearing, explaining they are bound. A ring appears on Yuuhi's hand allowing him to use magic, though he gets in trouble when he uses telekinesis to see up the skirt of his professor, Hisame. Noi demands Yuuhi locate the princess and defeat an evil mage, but he refuses. He is suddenly attacked by a golem and only survives when his next door neighbor, Samidare Asahina, saves him and is revealed as the princess with the spirit Anima inhabiting her body. Samidare is able to show Yuuhi the evil mage's most powerful weapon, a moon sized hammer called the Biscuit Hammer just outside earth's atmosphere. To prove Yuuhi is a Beast Knight, Samidare jumps from the roof and he instinctively saves her. Noi is angered to learn Samidare plans to defeat the evil mage, but only so she can conquer earth herself. Yuuhi then pledges his loyalty. (Source: Wikipedia)