CUBE Family made of 7 teams – HyunA, Jo Kwon, BTOB, CLC, PENTAGON, the newly debuted (G)I-DLE and the youngest Seon Ho – gather altogether to prepare for a Family Concert, 'UNITED ONE CUBE CONCERT.' CUBE Family is holding a family concert, which is the first in five years. All CUBE artists are joining in this concert to become one family. HyunA, the queen of sexy icon. Jo Kwon, prince of ballad. BTOB, professional idols producing and directing this concert. CLC, the hot girl group with both cute and girl crush concept. PENTAGON, monster boy band with their hit, Shine'. (G)I-DLE, the freshly debuted girl group with their hit 'LATATA' sweeping the charts. and Yoo Seon Ho, the youngest and everyone's favorite, leading to concert sellout tickets within minutes of his first fan meeting. Watch drama online for free.