I'm not entirely sure as I haven't read it specifically. But generally, a web novel could be about various things like adventure, fantasy, or the coming - of - age story of the main character.
One unique feature could be its world - building. It likely creates a world that is distinct from our own, with its own rules, cultures, and species. This makes the story very immersive.
Light novels usually have a variety of themes. 'naze boku no sekai wo daremo' might be about a protagonist who feels isolated in their world, as the title could be loosely translated to 'Why is no one in my world?'. It could explore themes of loneliness, the search for connection, and perhaps the character's journey to change their situation.
One light novel that might be similar is 'Sword Art Online'. It also has a complex world - building aspect like 'naze boku no sekai light novel'. Another could be 'Re:Zero − Starting Life in Another World'. It has a unique story with the protagonist facing various challenges in a different world, just like in 'naze boku no sekai light novel'.
Since I don't have in - depth knowledge of this'sekai saikyou no koei web novel', it might be a story that focuses on the rise of a protagonist to become the strongest in a certain world. It could involve elements of fantasy, such as magic, mythical creatures, and different races. The web - novel format might also mean it has an episodic structure with cliffhangers at the end of each chapter to keep readers engaged.
It could be about otome games in a web novel format. Otome games are typically aimed at a female audience and involve romantic storylines. Maybe this web novel explores different otome game worlds, characters, and their relationships.
Without having read the'sekai saikyou no koei web novel', it's hard to say. But typically in such stories, there could be a young and determined protagonist with some kind of special ability or talent. There might also be a mentor figure who guides the main character on their journey to become the strongest. And perhaps there are rivals or enemies who oppose the main character's growth and ambitions.