It's been two months since Ruka and Yuuichi started dating. Yuuichi is kind, and he's always such a gentleman; that's why Ruka has always liked him. She's trying hard to be a "proper girl," the kind that's right for him. But, when Yuuichi is standing in front of her with wet hair and his collarbones peeking through his shirt... She feels herself losing control!!! Ruka's mind is full of dirty thoughts, and she can't stop thinking about sex. Despite that serious problem, she has to spend the night at his place!! ...Will it be okay for her to become a wolf and pounce on him?