What is love, anyway? Ninako Kinoshita's friends tell her it's one thing, but Ninako wonders what this mysterious feeling really is. When she meets Ren Ichinose, the handsome, enigmatic guy that all the girls worship, her life takes an unexpected turn. With just a few words and a smile, he changes her world...

Once Ninako realizes that she's fallen for Ren, she confesses her feelings to him even though she knows he has a girlfriend! Meanwhile, a new semester brings an outgoing guy called Ando into Ninako's life--is Ando just an outrageous flirt or will he turn out to be Ninako's savior?