[11] In August 2015, she was appointed as co-MC on Weekly Idol along with AOA's Mina and VIXX's N, starting from September 2.

[13] Throughout her career as a singer, besides vocal contribution to Apink's songs, Oh has ventured into songwriting: she penned the lyrics for "What a Boy Wants" (2015)[14] and co-wrote with Eunji their duet single "It's You" (2016).

[15][16] In November 2016, Oh was cast in the two-episode web drama Brother Jeongnam, which later changed title into Please Find Her[17][18] and aired on KBS2 and KBS World on March 1, 2017.

[20] She reprised her role of female lead Yoo Ha-ri, an aspiring actress, in the sequel Love, Stay in Time (Korean: 사랑, 시간에 머물다),[21] which was made available on Danaflix on June 25 and screened nationwide at Danaflix cinemas for four weeks starting on June 27, 2018.

[28] In May 2020, Oh was featured in the official soundtrack of the KBS2 drama Soul Mechanic, singing the show's leading single, "I'm Fine".