A plot twist is a plot twist plot twist

"I'm pregnant, and I'd like to marry him." Seoho decides to suddenly arrange a marriage with a man he claims to have had a baby with. He introduces a man who turns out to be Ko Eunhyun, an alpha and the wealthy son of a famous hotel's chaebol family. In reality, they had only met yesterday in an one-night stand, but who cares about the little details!