One possible reason is a misunderstanding. The hero might think that they are in love with the person they marry, but later find out it was all a mistake. For instance, they might have misinterpreted their feelings of friendship or gratitude as love. Also, external threats could be a factor. If there is a threat to the hero's family or community, they might marry someone else as a way to protect them.
Sometimes, the hero may be influenced by false information. For example, if they are told that their true love has betrayed them, they could rashly marry someone else in anger or hurt. Additionally, the hero might marry someone else out of a sense of pity. If the other person is in a difficult situation, like being ostracized from society, the hero may marry them to save their reputation, without realizing the implications for their own romantic future.
Maybe she falls in love with someone who truly understands her on a deeper level than her previous relationships. This person might be more attuned to her dreams and fears, and she decides to marry them for that deep emotional connection.
Another possibility is that his death is part of a tragic plot device. It might be used to create a sense of pathos and make the story more memorable. For example, his death could be due to a misunderstanding that couldn't be resolved in time, leaving the heroine heartbroken.
The hero might offer emotional support, like being a shoulder to cry on and providing words of encouragement.
In some fictional settings, there might be a cultural or religious obligation within the context of the story. The hero might belong to a society where such an unusual marriage is seen as a solution to a problem. For instance, if the 'her novel' is personified as a deity or a very important figure in their fictional lore, marrying it could be a way to restore balance or gain favor.
I'd recommend 'Forsaken Hearts'. In it, the hero has an intense love for a person outside the main romantic pairing, creating tension and drama throughout the story.
Well, it usually makes the story more complex. The hero marrying someone else could be a setup for a love triangle or a quadrangle even. It might introduce new conflicts, such as jealousy among the characters involved. Also, it can give the author a chance to explore different themes like loyalty and sacrifice. The other characters might have to decide whether to fight for their love or let it go gracefully.
One possible reason could be a misunderstanding. Maybe the hero misinterprets the heroine's actions or words and lashes out with an insult.
Well, it could have different effects. Sometimes it might push the heroine to fight for the hero's attention, or it could lead to misunderstandings that need to be resolved. It all depends on how the author handles it.
One possible reason could be a misunderstanding. Maybe there was some miscommunication in the past that led the hero to form a negative opinion of the heroine. For example, he might have overheard something that was misinterpreted.
Rebirth novels referred to the protagonist being reborn in an accident and returning to the past to change the fate of himself and the people around him. Rebirth novels usually involved how the protagonist used the opportunity of rebirth to achieve his life goals while connecting with his past self to trigger a series of stories. The story about Yi Xiu's rebirth and marrying someone else was probably a story about the protagonist, Yi Xiu, who was reborn in an accident and returned to the past to change the fate of himself and the people around him. In the end, he married another character. This story might involve the protagonist connecting with his past self after rebirth, discovering the things he had done wrong, and using the opportunity of rebirth to make up for those mistakes. At the same time, the protagonist might also meet other characters and trigger a series of interesting stories.