Yang Se-jong is a South Korean actor and model. Yang became well known when he starred as a young chef in the 2017 romance drama Temperature of Love which won him three Best New Actor awards at the SBS Drama Awards, Baeksang Arts Awards, and the 6th APAN Star Awards. His other works included Dr. Romantic (2016), Duel (2017), Still 17 (2018), My Country: The New Age (2019) and Doona! (2023).

Temperature of Love is a 2017 South Korean television series written by Ha Myung-hee and starring Seo Hyun-jin, Yang Se-jong, Kim Jae-wook and Jo Bo-ah. It is based on the screenwriter's own novel titled Good Soup Never Picks up the Phone, released in 2014. It aired on SBS TV from September 18 to November 21, 2017, every Monday and Tuesday at 22:00 (KST) for 40 episodes.