헤비트레인, old gang 이후 3년만의 3rd Single Album [Level up] 더 넓은 집, 더 비싼 차, 나의 모든 것 다 Level up. beat by WhiteLIT Beatz Lyrics by 헤비트레인,Maro-O,망그리 Produced by 헤비트레인,Maro-O,망그리 Mixing & Mastering by Maro-O Album cover photo by 배병량