Rejected After One Night Stand, Desired by the Billionaire

Five years ago, she was schemed to have one-night stand with a stranger, resulting in a mysterious pregnancy.
Meanwhile, at her engagement party, she was humiliated by her fiancé, abandoned by her family, becoming the most notorious woman in the city.
He is the powerful and enigmatic heir to a conglomerate who unexpectedly enters her life.
From then on, her stepmother is utterly defeated, her ex-fiancé begs for forgiveness, and her stepsister pleads for mercy repeatedly.
He, ruthless as ever, declares domineeringly, "She's mine. Who dares to impose on her?" Everyone is stunned and shocked.
Her life undergoes a drastic change.