After discovering her crush and best friend are now a couple, Hee-won, feeling devastated, embarks on a wild night to seek comfort with a charming stranger. What was meant to be a one-time fling results in an unexpected pregnancy. As fate would have it, she reunites with the disciplined Doo-joon, who resolves to marry her for the sake of their unborn child. Despite their unfamiliarity, their bodies already share a deep connection. Now, as a soon-to-be mother, Hee-won grapples with the complexities of her situation.