On April 20, 2015, Arin debuted as a member of Oh My Girl. She first performed their debut single on SBS MTV's The Show on April 21. On April 2, 2018, Arin debuted in Oh My Girl's first sub-unit, Oh My Girl Banhana. On September 7, 2019, it was announced that Arin would be appearing on XtvN's The Ultimate Watchlist 2. In August 2019, it was confirmed that Arin would be taking part in Queendom.
