AIRU or Park Soo Jin is a big star, an idol with many fans from all over the world, well that was only a dream, in reality she was just an extra rich but ordinary girl with a passion for singing, writing and composing songs with limited time and a determined future, is that it though? incorrect, one day she came across this music and fell in love, Bulletproof part 2, that was the song, she sang it everyday, hoping to be a bulletproof too, she believed in that song. Later on she went into a Bangtan Boys concert, admiring them from afar, but she got more than what she thought she would.