I'm not sure specifically as I haven't read this novel directly. But generally, in the isekai genre, it might be about a second summoning to another world. Maybe the protagonist has been summoned once before and now experiences a second summoning with new challenges, adventures, and character development.
Well, the title 'kumo wa desu ka light novel' is rather mysterious. It might center around a character's identity as being 'kumo' (cloud). In light novels, often there are elements of the supernatural or other - worldly. So perhaps this 'kumo' is a special being, like a spirit or a magical creature. There could be a story of this 'kumo' interacting with humans or other beings in a fictional setting, with various plot twists and turns related to its existence and purpose.
One popular theme is Komi-san's attempts at making more friends. Another could be Komi-san's experiences in different social situations outside of school. Also, fanfics might focus on the relationship between Komi-san and Tadano developing further in various scenarios.