Hardworking, diligent, and serious college student Yuu can do anything with ease—which causes most guys to find her far too intimidating. Longing to become someone’s "number one," she wonders if she’ll have to change who she is to find love. That’s when she meets Yang, an attractive and friendly Chinese exchange student. But looks can be deceiving, as she discovers his life-altering secret! What began as a "professional" arrangement between a headstrong girl and puppy-like boy blossoms into a heart-pounding pure romance!