[2] Her younger sister Yu-ri made her debut in 2014 with girl group Berry Good under Asia Bridge Entertainment, adopting the stage name "Seoyul".

In 2015, AOA traveled to Hainan where they filmed One Fine Day, a variety program in which idols/idol groups go on a "healing" vacation.

They were the seventh idol group to appear on the program(followed by Girl's Day)[citation needed] Yuna is also part of sub-unit AOA Cream together with Shin Hye-jeong and Kim Chanmi.

[12] Yuna has also had a successful, yet lesser known acting career, as she has played a lead role in the Japanese Musical "Summer Snow" in 2013, as well as playing another lead role in the comedic Korean web-drama "Prince's Prince" in February 2015.

On October 20, 2013, Yuna sang for the OST "I'm Ok" for KBS's TV series Marry Him If You Dare.

In October 2016 it was announced that she will be part of the cast of a new web-drama Hot and Sweet playing Joon Young, a part-time food worker.

[18] In 2017, Yuna was cast in the romantic comedy series Single Wife, scheduled for August 23.

[20] Yuna sung the OST for tvN's A Korean Odyssey together with Shin Ji-min, the song is called "If You Were Me" and it was released on January 28, 2018.

[23] After her departure from AOA, Yuna gave an update on her social media and revealed she had transformed into a yoga instructor and living a new life outside of the entertainment industry.