On March 21, a rep of tvN confirmed to MyDaily that, "Nam Ji Hyun, Do Kyung Soo, Jo Sung Ha, and Kim Seon Ho are appearing on '100-Day Husband'. The script-reading started on the 21st. 

'100-Day Husband' is a romance mystery telling the suspenseful story of a perfect prince named Lee Yool and a smart and witty woman named Hong Shim, who operates the Joseon era's first ever detective agency. 

This will be D.O.'s first lead role drama. The airing date is not yet confirmed. Stay tuned for updates!