Seohyun is a very cheerful girl. But after a certain day, she stopped going to school. Yonghwa, her secret crush who always secretly lags around her during lunch break and in between classes, decided to look up her address in the school address book. As he loves her a lot, she is stunned to see her crying on Kyuhyun, Yonghwa's buddy's shoulder. Yonghwa is heartbroken and does not go to school too! He saw that Kyuhyun always runs to Seohyun's house right after school. One day, Yonghwa cannot