Closingbr Hyuna (Roll Deep (feat. Jung Il-hoon of BTOB))br This is the title track of Hyuna's fourth mini album, "A+." It has a br br simple yet powerful bass, a trendy beat, and an addictive hook. Those br br who keep themselves busy to rise to the top will be able to relate. It br br features Jung Il-hoon of BTOB who helped perfect the song.