He debuted as a member of the South Korean boy band VIXX in May 2012,[2] he began his acting career in 2014 in MBC's romantic-melodrama Hotel King as Noah.

[5] Before debuting with VIXX, N participated in a musical called Gwanghwamun Love Song[6] and entered in dance competitions.

[12][13] Prior to participating in MyDOL, N was featured in Brian Joo's "Let This Die" and Seo In-guk's "Shake It Up" music videos.

[14][15] In the year 2012, after VIXX's debut, N became a cast member in the second season of TVN's reality television show The Romantic & Idol.

[16] In 2013 with the release of VIXX's album, Jekyll N created the choreography to go along with title song "G.R.8.U" of the repackaged Hyde mini-album;[17] he also appeared in Episode 4 of SBS's Television Drama The Heirs alongside his group members.

[22] Going by the stage name Dol Baeki, N and the group created two singles "Stress Come On" and "Ojingeo Doenjang" (Korean: 오징어 된장).

[40] In the same month, N was cast alongside fellow VIXX member Lee Hong-bin and AOA’s Chanmi in the web drama What's Up With These Kids?

[41][42] In November N was cast in the musical In The Heights as the lead role of Benny from December 20, 2016, to February 12, 2017, at the CJ Towol Theater in Seoul Arts Center.

[49] The same year, he played a supporting role as Oh Kyung-tae, a warm-hearted police constable in tvN drama Bad and Crazy.