Mana (마나)

Junghoon has a crush on his high school teacher, Jieun. She is his first love. One day, Junghoon finds out his teacher is going to get married. Rumors starts to fly that Jieun married a rich man and that she was a concubine. Devastated, Junghoon lost his feelings for his first love. Years later, Junghoon is still unemployed and lived a life doing one night stands with other women. Felt with pity for his life, Junghoon's friend introduced him to a job opportunity in becoming a driver to a rich household. During his interview, Junghoon meets his first love, Jieun, now as the mistress of the mansion.

Da-Young Kim happily donated her liver to her mother-in-law, but all she got was betrayal in return. Her husband’s whole family nefariously used and abused her, kicking her out before she even fully recovered from surgery. They went on with their lives, blissfully unaware that Da-Young swore revenge. She begins to systematically destroy their lives as they did hers, but what happens when someone unexpected gets in the way of her best-laid plans? Will accomplishing her mission bring her happiness… or will it only get in the way of true love?