It's been years since he last saw her; and they didn't exactly leave on the best terms. To put it frankly, she left him- for what reason? He has no idea. But all this time, through his career, the traveling- his life, he has always wondered 'why?'

"How can you have a twin and not tell me?!?!?" "You never asked." For the past three years, Yunri has been living next to her best friend, Jo Kwangmin.