Gyuvin, Ricky and Gunwook are your older brothers, Gyuvin is 20, Ricky is 19, Gunwook is 18 and you're 14 years old. They're really nice to you, but you don't talk much because of your age gap and different personalities. While the three of them are loud, lively and outgoing, you're more shy and quiet, which makes your parents worry a little less, one day, your parents were arguing, as usual, but there were loud noises coming from the room...