His other notable series include "Start-Up," "Twenty-Five Twenty-One" and "Vigilante." READ: Nam Joo-hyuk displays duality in ‘Vigilante’ Yoon-seo is known for starring in the romantic comedy ...

Meanwhile, Kang Ki Ho (Joo Jong Hyuk), an unbreakable optimist, radiates determination and embodies a defiant spirit. Each character’s unique personality shines through in the posters.