MTL - I’m the City Lord of the Last Days - Chapter 18

After being imprisoned in the basement by her mother for ten years, she ended her cruel and tragic life in death when they forced her to hand over the key to the hidden treasure. Getting reborn in her teenage years, she woke up in the bed of that terrible and powerful man. This time, she must take revenge on her enemy, and now she must live.

Ade has lived in an incense burner for over a thousand years, her days spent sleeping. Longing for the outside world she hears about from her fairy friends, her wish is finally granted when a man brings her home, releasing her from the seal. Ade, tears streaming, vows to repay her savior to the fullest extent.Qin Yu, known as the cold and ruthless Third Master Qin of Kyoto, finds his life upended when strange occurrences plague his bedroom after he places an antique incense burner given to him as a New Year's gift there. Chaos ensues, with items displaced and unexplained puddles of water; he even senses something in his bed while half-asleep.One afternoon, Qin Yu comes home early to find a young girl cleaning up spilled milk. The girl, her black hair cascading, her skin porcelain, is startled by his return and tries to flee. Upon being caught and questioned by Qin Yu, she timidly speaks of repaying her debt.To Qin Yu's amusement, she lists her belongings: pearls, antiques, even her savings. None of these interest Qin Yu, who instead sweeps her into his arms and suggests a more personal way of repaying the debt. Terrified, the girl's beautiful fish tail is revealed.

She and the blind date met man get married soon. She did not expect that the "ordinary" new husband turned out to be the CEO of the company she worked for.

Kwan Dae-ha.