The Smile Has Left Your Eyes is a 2018 South Korean television series starring Seo In-guk, Jung So-min and Park Sung-woong. It is a remake of the 2002 Japanese television series Sora Kara Furu Ichioku no Hoshi. It aired on tvN from October 3 to November 22, 2018 every Wednesday and Thursday at 21:30 (KST).

Seo In-guk is a South Korean singer-songwriter and actor. He launched his singing career after winning the talent reality show Superstar K in 2009, and made his acting breakthrough in Reply 1997 (2012). Since then, he has starred in television series Master's Sun (2013), High School King of Savvy (2014), Hello Monster (2015), Squad 38 (2016), Shopping King Louie (2016), The Smile Has Left Your Eyes (2018), Doom At Your Service (2021), Café Minamdang (2022), and Death's Game (2023).