" Kim Hana is PERFECT! " those words may come from anyone who doesn't know anything about Hana. She's a cute, hot, sweet and NAIVE! BUT, one thing that no one realize she's such a stupid girl (oppsss) until she enter her class and also known as "THE CLASS OF STUPID BUT CUTE STUDENTS". everyone is scared with that class. that class is just for the students that always fail on their exam.

Hana keep a feeling at L, the most handsome, smart and genius boy at Aurora's High School. He's a arrogant person and cold toward everyone that he doesn't know. Hana keeps peeking on him everyday while he was study. One day, on her best friend's advise, she decided to write a love letter to L. What will L do? What will happen to Hana? Is this story will be like "Playful Kiss" where Oh Ha Ni were dumped by Baek Sung Jo?