Ai Mili, a poor Asian female college student, accidentally had a one-night stand and got pregnant with Michael, the cold-faced heir of a chaebol, while trying to save her seriously ill younger brother. He signed a one-year contract marriage with her for 500 million, thinking it was just an exchange of interests. However, amidst workplace bullying, family oppression, and daily tussles, they went from being at odds to falling for each other. When the contract expired, he said, "I don't care about the 500 million. I only want you."
