To win over your husband in a manhwa, first, focus on building trust. Be supportive of his dreams and hobbies. And don't forget to show appreciation for the things he does for you.
You could try understanding his interests and hobbies and joining him in those activities. Maybe show genuine support and appreciation for what he does.
To win your husband over in a novel, maybe focus on building trust and shared interests. Cook his favorite meals or engage in activities he enjoys. Another key is to give him space when he needs it and show appreciation for the little things he does.