Na Yuri has always been a.. pretty much hardcore fan of B2ST. Despite being 19, she's pretty much the only one in her school who knows B2ST. Posters of them are all over her room, their songs are the only songs in her phone, and nearly every single clothing she has will have either B2ST's logo or graphics or Batman graphics. In short, she's quite overly obsessed with B2ST. But, she really didn't know that her sister was one of Dujun's elementary school friends. On her birthday, just like any other birthday she celebrates silently with her sister under a huge tree. But only, that her sister brings along Dujun and his mates.