Arin debuted with Oh My Girl in April 2015 and later became part of its first sub-unit Oh My Girl Banhana. In 2019, she and her fellow bandmates participated in the first season of the Mnet reality competition show Queendom, where they placed second. In 2020, she made her acting debut in the web series The World of My 17. In 2022, she landed her first big screen role in the anthology horror film Seoul Ghost Story. That same year, she was cast in the tvN fantasy romance Alchemy of Souls.