Wheein and Yongsun have known each other for quite some time, though not extremely close, they've been around each other long enough to consider each other friends. They first met in college through their bestfriends, Hyejin and Byul, who were both studying architecture. Wheein was an art major and Yongsun was a business major. Hyejin and Wheein grew up together, while Byul and Yongsun have been inseparable since high school.  Now nine years later, they're all thriving