He was previously a cast member of Master in the House from July 3rd, 2022 until the show's final air date of April 23rd, 2023.

[1] In late 2013, Doyoung became a trainee at SM Entertainment after being scouted at the Guri City Youth Art Festival singing competition.

[3] Doyoung made a special appearance in episode 11 of the Korean remake of The Mickey Mouse Club, singing "Beauty & the Beast" as a duet with then-SM Rookies member Koeun, which aired on Disney Channel Korea on December 13, 2015.

[6] In July 2016, Doyoung collaborated with Shinee's Key on the song "Cool" for the soundtrack of OCN television series Squad 38.

[14] In October, he collaborated with Gugudan's Kim Se-jeong to release "Star Blossom" (별빛 이 피면) through the second season of SM Station.

[16] In March 2019, Doyoung collaborated with indie duo Rocoberry on the song "Don't Say Goodbye (헤어 지지 말아요, 우리)".

[18] He advanced to the final round based on his renditions of "Beautiful" by Crush and "Time Spent Walking Through Memories" by Nell, competing alongside the reigning champion, Nightingale.

[20] In November, Doyoung collaborated with labelmates BoA, Siwon, J-Min, Sunny, Taemin, Suho and Wendy as part of SM Town on the song "This is Your Day (for every child, UNICEF)".

[23][24] On April 19, 2021, it was announced that Doyoung had been cast in his first musical, Marie Antoinette, as one of three actors playing the male lead role of Count Axel von Fersen.

[25][26] On August 5, 2021, producer Ryan S. Jhun announced through his personal Instagram that Doyoung and fellow member Haechan would participate in the first single from his first album.

[32] On May 1, the album's title track "Little Light" won first place on the weekly music television program Show Champion.

[38] On March 8, 2022, Doyoung donated ₩30 million to the Hope Bridge Disaster Relief Association to help the victims of the massive wildfire that started in Uljin, Gyeongbuk and has spread to Samcheok, Gangwon.

[40] On February 7, 2025, Doyoung donated ₩30 million to the Ministry of Health and Welfare's Child Meal Support for undernourished children and teenagers.