Professor Fu, This Time I Fell into Your Hands.

Two Male Leads, Transmigration, Preferably Involving the Underworld

Looking for books similar to *I Became the Male Lead's Villainous White Moonlight*. I want stories where someone transmigrates into the male supporting character who abused the male lead, then wins the male lead over by rewriting the plot brilliantly. The male lead should preferably be sweet on the outside but dark inside, friends! One important thing: it'd be best if the story involves the underworld!