He is an actor and singer who has established himself as a representative face of Hallyu, persuasively portraying good and gentle characters. While moving between romance, historical dramas, youth dramas, and genre works, he never loses his unique neat and warm sensibility, adding reliability to every project he appears in.
Starting with minor roles in works like 'Blind' (2011) and 'Wonderful Mama' (2013), he gained attention by playing a genius cellist in 'Naeil's Cantabile' (2014). His real breakthrough came with Choi Taek, the go genius in 'Reply 1988' (2015) — he gained nationwide popularity with his taciturn yet lovable character, rising to become a Hallyu star.
He reached the pinnacle of historical romance with his role as Crown Prince Lee Yeong in 'Love in the Moonlight' (2016). He broadened his range with his portrayal of aspiring actor Sa Hye-jun in 'Record of Youth' (2020) and his romantic acting in 'Encounter'. In 2025, he also ventured into genre works with 'Good Boy', playing a former boxer turned detective.
In Tangerines, he played the young Gwan-sik, who consistently protected Ae-soon throughout her life, establishing the emotional core of the drama. His neat image deeply overlapped with the character who proves love through actions rather than words.
The other main lead of Tangerines is IU, and the script can be found on Lim Sang-choon's page. More works continue in Drama.