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.
A sekai visual novel is a form of literature - meets - gaming experience. It is often presented in a visual format with character sprites and scenic backgrounds. These novels can have deep and complex storylines. They may also include elements of character development, relationship building, and plot twists. In a sekai visual novel, you as the player are an active part of the story, and your choices can lead to different endings, which adds to the replayability factor.
Since I haven't read 'boku girl boku no arbeit novel' directly, I can only speculate. However, from the title, it might deal with the concept of identity ('boku girl' could imply something about gender identity or self - perception). Also, 'arbeit' might suggest themes related to work or purpose in life. There could also be themes of personal growth and the challenges one faces in the context of work and self - identity.
One similar novel could be 'Kimi no Na wa' (Your Name). It has a unique story about two people who mysteriously swap bodies and their journey to understand each other. Another might be 'Orange' which also deals with complex relationships and personal growth in a rather poignant way. And 'A Silent Voice' is also a great choice as it focuses on themes of redemption and friendship like many good novels in this genre.
I'm not sure specifically as there could be many different 'arata naru sekai' light novels. It might be about a new world, as 'arata naru' can mean 'new' and'sekai' means 'world'. But without more context, it's hard to say for sure.
Sekai Game Light Novel could refer to light novels related to Sekai Game. It might involve various genres such as fantasy, adventure or slice - of - life. Maybe it features unique characters, interesting storylines, and immersive worlds that are typical of light novels in the context of Sekai Game's universe.