In 2012, Park wrote a song for the Korean drama series Dream High 2, which was released on February 14, 2012.

[7] On January 26, 2017, it was announced that Wonder Girls were to disband after unsuccessful contract renewal negotiations with some of its members, including Yeeun herself, who parted ways with JYP Entertainment.

[1] In April 2017, Park signed with Amoeba Culture, becoming the label's first female solo artist in eleven years.

[10] On April 23, 2020, Park released her first full-length album, 1719, along with music videos for the three leading singles ("Life Sucks," "Sweet Sensation," and "Satellite").

[12] In November 2022, Park was announced, will hold a solo concert ORANGE Friday' at Shinhan pLay Square Live Hall in Seoul on the 18th.