One example could be 'The Bride' by Julie Garwood. In this novel, the hero kind of 'kidnaps' the heroine in a rather complex situation that leads to a passionate romance.
You might want to check out 'Forbidden Love's Twist'. Here, the hero's kidnapping of the heroine sets off a chain of events that challenges their notions of love and fate. The intense plot keeps readers on the edge of their seats.
These plots are popular as they play on the idea of 'opposites attract'. The hero, who is often seen as the 'bad guy' at first for kidnapping, turns out to have a soft side and falls in love with the heroine. It's a classic trope that has been used in many successful romance novels. It gives a lot of room for character development and emotional growth as the two characters get to know each other under such extreme circumstances.
The 'Twilight' series also features Bella and Edward as relatively innocent characters at the start. Their love story, with all the supernatural elements, is a huge hit. The fact that they both have a certain naivete in the beginning regarding love and relationships adds to the charm of their story.
You might consider 'Broken Promises'. Here, the hero abuses the heroine due to his own inner demons and past traumas. However, as the story progresses, he realizes his mistakes and tries to make amends.
One popular example is 'Pride and Prejudice' by Jane Austen. Mr. Darcy comes to Elizabeth's aid on several occasions, showing his care and protection.
I'd recommend 'Ever After' by John Smith. It portrays a beautiful married life of the hero and heroine, filled with sweet moments and difficult tests that they overcome together. The characters are well-developed and the story is both heartwarming and exciting.
Well, one could be 'Dark Desires' where the hero's actions towards the heroine are quite tormenting throughout the story.
I'd recommend 'Love's Detour'. Here, the hero is so focused on his own goals that he ignores the heroine's attempts to connect. This leads to misunderstandings and challenges in their relationship.
One such novel could be 'The Knight's Embrace'. In this story, the brave knight saves the damsel in distress multiple times, adding lots of exciting moments.
One such novel could be 'The Forbidden Love Affair'. In it, the hero initially despises the heroine due to a misunderstanding from their past.