I Favor You Tenfold

To inherit his grandfather's estate and uncover the mystery of his own parentage, Lu Yi'an chose to enter into a marriage agreement with his neighbor, Fu Man, who was ten years younger than him.

He thought it would be a mutually beneficial arrangement, with both sides getting what they needed. But things soon began developing in ways he never expected.

Fu Man: "Uncle Lu, I'm afraid of the dark..."

Fu Man: "Uncle Lu, I'm afraid of thunder..."

Fu Man: "Uncle Lu, could you stay with me while I sleep..."

Lu Yi'an: "...Ahem... I can."

Lu Yi'an thought Fu Man was a harmless, delicate little white rabbit, but it turned out she was a little fox full of schemes. He went from having nothing to distract him to reciting a calming mantra every day just to face Fu Man.

Fu Man (curious): "Uncle Lu, what are you chanting?"

Lu Yi'an (without batting an eye): "A spell to vanquish demons."

Fu Man: "?? So I'm a demon? Did I manage to tempt you?"

Lu Yi'an: "...Yes."

Theme: Love takes a whole lot of courage.