"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.

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?'