Do Kyung-soo has been confirmed as the protagonist of "100 Days My Prince". "Do Kyung-soo plays Won-deok (Lee Yool) in the drama, a perfect prince who is always in control. He is a ruthless person who wants to be a perfectionist, but he is injured by the killer's attack and falls off a cliff, and inexplicably becomes Won-deok. Won-deok is a boy who is useless in any way. After Lee Yool becomes Won-deok, his world has changed drastically. "100 Days My Prince" is a suspenseful love drama based on the disappearance of the prince. The prince who was thought to have died returns to the palace again after 100 days. It is curious what happened during this journey. The drama is currently discussing the scheduling with tvN.