My Backup Husband is a Tycoon

Granted a second chance at life alongside her jealous sibling, a pragmatic woman willingly yields her billionaire fiancé to her greedy sister. Knowing that the prestigious aristocratic household is plagued by infidelity and misery, she happily settles for a quiet marriage to an ordinary building security officer.

While the sister's glamorous domestic life disintegrates under serial affairs and broken promises, the modest security guard commands unexpected deference from elite tycoons. When the truth regarding his supreme corporate pedigree emerges, the regretful sibling realizes she picked the wrong groom all along.