Lady Boss's Perfect Revenge

"After seven years of sacrifice, Ye-won is betrayed by her boyfriend and publicly humiliated when he chooses to marry his wealthy benefactor. On the same day, she enters a contract marriage with Tae-jun, the CEO of Kanghan Group. Returning as the group's powerful mistress, Yewon turns the tables, revealing her true identity as the real owner of the Sera Group, and beginning her revenge."