Zhang YiXing, a 19 year old freshmen in Seoul University. Yi Xing, or Lay as he likes to be called, has someone he loves.

Kim Haera, a 18 year old girl who skipped high school and is also a freshmen in Seoul University.

They were childhood best friends, friends that told every secret they knew to each other. However, it all soon turned out to be more than just friends. They started to develope feelings towards each other. Both were happy, until one tragic accident caused everything to be upside down.

Haera was in an accident, causing her to lose her life. Yi Xing broke down after hearing the news, and soon everything for him never seemed to work.