Jungshin was a worked hard student. He always had many questions to his teachers. He was loved by many people. But... He had to help his aunt everything such as reviewing lessons in a small note and gave to his aunt every Thursday. Because he and his aunt were lover...

Eunjung was Jungshin's aunt, but Eunjung was older than him only 1 year. It was a structure of families related. They studied in the same school and class of Economic. 

Jungshin always cared about Eunjung, but Eunjung was a bit childish and fell on herself too much. Sometimes,she cared Jungshin, but sometimes, she ignored Jungshin. But Jungshin still supported his girlfriend or his aunt,Eunjung. 

One day, Eunjung and Jungshin had a big argument. 

They seperated a while... Then Jungshin was changed after he met a girl named "Jiyeon" ...