It could be about a wife who discovers that her billionaire husband is leading a secret life. Maybe he has another family, or is involved in some underhanded business deals on the side that he has been hiding from her.
Another theme might be self - improvement. The female lead may need to grow and change in order to fit into the billionaire's world, which could involve learning about business, etiquette, etc. Also, the theme of redemption could be there. Maybe the billionaire has some past issues or a cold heart that the female lead helps him to overcome.
Well, usually in such novels, it might involve the female lead discovering the hidden sides of her billionaire husband. Maybe he has a secret identity or some sort of double life in the business world or his personal relationships.
In some cases, the discovery of the double life could lead to a big scandal that not only affects their personal relationship but also his business empire. The husband might lose his reputation and a significant amount of his wealth as a result. And the wife may or may not stay with him depending on how he handles the situation and whether she can forgive him for all the lies and deception.
In this kind of story, perhaps there are elements like his business dealings that are not what they seem on the surface. He might be involved in some shady or extremely competitive and cut - throat business practices that he keeps from his family. Also, there could be a whole other side to his personal relationships, like having a second family or a secret group of friends that are part of his 'double life'.
It could start with the heroine having her own independent life and goals. When she meets the billionaire, her world gets turned upside down. He might be used to getting what he wants, but she stands her ground. There could be a lot of emotional turmoil as she battles her own feelings for him and her determination to stay true to herself. Along the way, there might be other characters who either support or oppose their relationship, and through various events and revelations, their relationship progresses or deteriorates.
The female character is probably independent and strong - willed. Despite the accidental marriage, she doesn't let the billionaire status of her husband overshadow her own identity. The male character, being a billionaire, might seem cold and distant at first, but as the story progresses, he shows his softer side.
In the'my accidental husband is a billionaire novel', it's common to expect a Cinderella - like story. The female lead might be an ordinary girl who through some unexpected event becomes the wife of a billionaire. This sudden change in her life would bring a lot of challenges. She may have to adapt to a high - society lifestyle, deal with the media scrutiny, and at the same time, figure out if her relationship with the billionaire is based on true love or just the circumstances of their accidental marriage.