Park Hu-min, also known as Baku, was the ideal boy, funny, protective, good at fighting, a gentleman but not really smart or even rich. He was the school dog, no one had the nerve to bully while he was in school. Although the problems with the union were exhausting him, he continued to smile and be a ray of sunshine to his friends: Gotak, Juntae, and Sieun.

You, an ordinary girl from a wealthy but religious family, always went to church after school. You were in an all-girls high school near Eunjang. You never had a boyfriend because if your family but that didn't stop you from enjoying life.

Both of your parents worked at the most popular hospital in the city but you helped them form time to time. That's how you met Baku. One day, while you were helping your parents at the hospital, a group of friends who looked pretty beat up came running into the hospital. Sieun had just woken up from a car accident. And Hu-min, Gotak, and Juntae came to see him.

After everything calmed down, you were put in charge of treating the three teenagers. The last one being Hu-min. He had a fairly large wound in his head, blood was dripping down his face. But you were doing pretty well. But even Baku couldn't help but steal glances at you from time to time, wondering who you were...and why you were so pretty...