Some individuals might be more interested in the action or adventure elements that might be present in the novel but overshadowed by the love plot. They want to read about battles, mysteries, or heroic deeds rather than the lovey - dovey stuff. Also, some people might find the love stories in such novels to be predictable. They already know how most love stories go, so they lose interest quickly.
It could be that they are more interested in other aspects of the novel, like the plot twists, the setting, or the character development that is not related to love. For example, if the novel is set in a fascinating historical period, they might focus on that rather than the love story.
I'm not sure specifically as I haven't read it. But generally, it might be about a romantic relationship. Maybe it tells the story of two people falling in love, with various obstacles and sweet moments in between.
There are often the lovers, of course. The male and female leads who are at the center of the love story. There may also be a best friend character who gives advice or causes some complications.
In many love novels, the theme of sacrifice for love is prominent. Characters may sacrifice their own desires, careers or relationships for the person they love. Another aspect could be the power of love to transform individuals. It can make a shy person more confident or a bitter person more kind. And of course, the journey of finding true love, which often includes misunderstandings, heartbreaks and reconciliations.
It depends on the genre and the overall plot. In some novels, a love interest can show up early to drive the story. In others, it might come later to add a twist or depth.
There's also a possibility that it's a healer in his village. She might have been the one to patch him up after battles. Over time, she gets to know the real Deidara behind the tough ninja exterior. Her gentle nature could contrast with his more brash and explosive personality, and this contrast could be what draws them together in a love story.
Sebastian Michaelis' story has Ciel as a key figure related to what could be considered a love - like relationship. Since Sebastian is a demon bound by a contract to Ciel, his loyalty and the way he behaves towards Ciel, protecting him and being by his side constantly, makes Ciel the most likely candidate for a love interest in Sebastian's story, although it's a very different kind of relationship compared to traditional love stories.