Mr. Plankton (Korean: Mr. 플랑크톤) is a 2024 South Korean romantic comedy television series written by Jo-young, directed by Hong Jong-chan, and starring Woo Do-hwan, Lee Yoo-mi, Oh Jung-se, and Kim Hae-sook. The series tells the story of a man named Hae-jo, a man who was the product of an incorrect artificial insemination, as he forces Jae-mi, the world's most unlucky woman, to accompany him on his last journey in life after learning he is terminally ill. It was released on Netflix on November 8, 2024.