On this week’s Music Bank K-Chart, Twice comes back cuter than ever with a fun summer song. The ever charismatic Jessi takes over the stage and tells you she won't let you down. Gugudan SEMINA makes everyone jealous with their beautiful looks. Apink shows of their innocent but sexy side with “I’m So Sick”. Momoland brings their addicting melody to the stage to bring everyone’s energy up. A.C.E, fromis9, NTB, Gyeong Ree, ONF, UNB, and more perform.