One & Six is the seventh mini-album by South Korean girl groupApink, released on July 2, 2018. The album's lead single "I'm So Sick" is the title track. Like their previous albums, the members Park Cho-rong and also Kim Nam-joo (singer) participated in writing songs for the album. The album reached number one on the Gaon Album Chart, and also entered into Billboard's World Albums Chart at number 11.
The EP One & Six was released on July 2, 2018. One & Six debuted at No.1 on South Korea's Gaon Album Chart while its single "I'm So Sick" debuted at number 7 on Gaon Digital Chart. The tropical sound of "I'm So Sick" boosted many interests in Apink as they swapped out their girlish image for something far more compelling.