Do you know me?!

Yeo-ju and Il-hoon were friends when they were young, but Yeo-ju left for a foreign country and broke up with Il-hoon. They met again when they were 18, but Il-hoon treated Yeo-ju coldly. Then he pushed her away. After that, Yeo-ju and Il-hoon's relationship deteriorated, but in the end, they were very close!