As I don't know the actual 'l o'brien' romance novels, it's hard to say. But generally, romance novels often have elements like a central love story, character development of the protagonists, and some sort of conflict that the couple has to overcome.
I'm not sure which specific 'K L Rahul love story' you are referring to. There could be many people named K L Rahul. If he is a public figure, perhaps it's a story that is not widely known to the general public.
One popular theme could be friendship. O2l members were known for their camaraderie, and fanfictions might explore deeper aspects of their friendships, like how they support each other through tough times. Another theme could be adventure. Fans might create stories where the o2l crew embarks on exciting adventures together, perhaps traveling to far - off places or facing thrilling challenges. Also, romance is often a theme. Since the members were young and attractive, fanfictions could pair them up in various romantic relationships, exploring the development of love and attraction between them.
Well, the main characters are without a doubt the o2l members. Since the fanfiction is adopted by o2l, it makes sense that the guys like Sam Pottorff would be the main focus. Their charm, their unique styles, and their relationships with one another are what draw fans to write stories about them, so they are the ones who usually populate the pages of these fanfictions.
I haven't heard of 'l o'brien' specifically in the context of romance novels. Maybe you can search for it on Goodreads. People there often discuss and recommend various novels, and you might find some information about 'l o'brien' romance novels if they exist.
I'm not sure who 'k l rahul' and 'athiya shetty' are exactly in terms of a love story. There might be some relatively unknown individuals or a very specific context that I'm not familiar with. Maybe it's a story within a particular community or among a small group of people.