Lee HyeJin and Min YeongJa have been childhood friends ever since they can remember. As they grow up they start to feel more like sisters. One day, they end up going to the same college and THEY all end up as roommates. If you're wondering who 'They' are, It's HyeJin, YeongJa, A guy they meet named JeongHo and his best friend YeJun. What will happen throughout the years?