He is best known for his television roles in The Ghost Detective, Jugglers, High Kick Through the Roof, Baby Faced Beauty, School 2013, and rom-com film Cyrano Agency.

[11] As a child, his name was considered unusual, and his peers would call him "Yogi Daniel" (a famous yoga master and contortionist), and would jokingly ask him to squeeze himself into a desk.

[14] On 2 October 2015, Choi enlisted in the Republic of Korea Army to serve his mandatory military service.

Due to a knee injury he suffered in late 2012 while shooting the drama School 2013, he was deemed unfit for physical duty.

[17] As alternative military duty, after four weeks of training, he was assigned to serve at the Seoul VHS Medical Center as a public service worker.