The Secret Tycoon Son-in-Law

The marriage is arranged, and Michael moves into his wife's family home as the live-in son-in-law. From the wedding night on he treats guarding her as the job. Her parents complain about him around the house and see nothing in him worth having. The city runs differently than they think. He is the richest man in it, and the business partners who deal with him are on their knees within seconds. A rich young man tries to force his wife into marrying him and finds his family's group pushed to the edge of bankruptcy. Another one harasses her and his factories stop running the same day. At her office her boss takes credit for work she did, and one sentence from Michael is enough to have the man apologising.