Don't Run Away, Substitute, Mr. Mo Has Fallen in Love with You.

It was originally just a deal where everyone got what they needed, but Xia Ruhua gradually fell into it. Although he doted on himself, he always had an indifferent expression. As the fog slowly dispersed, Xia Ruhua felt disheartened. Determined to leave and reluctantly entangled, Xia Ruhua finally saw the shadow of love in the depths of Mo Haotian's eyes, but she did not expect that the truth 16 years ago would surface. His revenge left Xia Ruhua helpless, and she once again became his bed partner, doomed to be entangled... (The full text is more pampering than cruel, I hope the little angels like it.)