Kwon Se-in, better known by the stage name Kwon Yul, is a South Korean actor. He made his acting debut with a leading role in the 2007 high school sitcom Mackerel Run. Kwon is best known for his roles as Seo Ji-seok on the daily soap opera Angel's Revenge (2014), Yi Hoe in the blockbuster period film The Admiral: Roaring Currents (2014), and as Lee Sang-woo in the hit romantic comedy series Let's Eat 2 (2015).

Mackerel Run is a 2007 South Korean television series that aired on SBS from May 12 to June 30, 2007 on Saturdays at 16:40 (KST) for 8 episodes.