Hey, let me recommend you an ancient romance novel called " The Black-bellied Prince's Baby Concubine." The female lead in the story was also a childhood sweetheart who was betrayed by her family and became someone else's marriage tool. However, after being abused for a long time, she suddenly realized that her childhood sweetheart was her most reliable support. However, he was not the kind and warm boy she remembered, but a black-bellied prince. The story is full of sadomasochistic love, which is very suitable for your taste. I hope you like my recommendation.😘