My Secretary Who Once Was My Wife— Episode 20

Ha-eun signs a 1-year contract marriage on paper to pay her grandmother's medical bills, not knowing that her partner has been mistakenly replaced with Dohyun, an heir to a rich family. Accidentally reunited as a new secretary and a coldhearted CEO after a long time, Ha-eun and Dohyun find themselves drawn to each other and fall in love.