On January 14th, 217, she won the Women's Newcomer Award in the 31st Golden Record Awards with I.O.I; On January 18th, I released a farewell commemorative single "Shower" with I.O.I, which was also the last song of I.O.I's one-year activity.
On August 2, 218, the contract with JYP Entertainment was terminated; On September 15th, he cooperated with Park Bo Gum as MC of the World Tour Concert of Music Bank; On September 24th, it signed a contract with THE BLACK LABEL, an independent music label under YG Entertainment.
On June 13th, 219, the first personal extended play BIRTHDAY》; was released; In October, he starred in the variety show "Kim Byung-man's Jungle Law" with his father. In January 216, he participated in the talent show "Produce 11" as a JYP Entertainment trainee; On April 1st, he won the first place in PRODUCE 11 with more than 85, votes, and became a member of the limited group I.O.I He took the central position in the group and conducted activities as a member of the group for one year. On April 5th, the first single CRUSH was released with the group.