Seo Kang-joon

Lee Seung-hwan (Korean: 이승환; born October 12, 1993), known professionally as Seo Kang-joon (서강준), is a South Korean actor and former singer, who was a member of the group 5urprise. He gained recognition with his role in the television series Cheese in the Trap (2016) and has since starred in Are You Human? (2018), Watcher (2019), When The Weather Is Fine (2020), Grid (2022), and Undercover High School (2025). source: https://en.wikipedia.org/wiki/Seo_Kang-joon