Well, it's hard to say for sure. It could be inspired by real events but heavily fictionalized. Or it could be completely made up. Without more information, it's difficult to determine.
I don't know what kind of 'instruction manual' you're referring to because I don't have the relevant context information. If you can provide more information or clarify your question, I will try my best to answer.
I'm not sure as I haven't read it specifically. But generally, a 'regressor' in novel terms might imply a character who goes back in time or reverts to a previous state. So perhaps this novel is about a character who is not such a regressor and has a different kind of story, like a forward - moving adventure or a story based on present - day challenges.
I'm not entirely sure as there could be many different 'past life regressor' novels. Generally, it might be about a character who can regress to their past lives and experiences things over again, perhaps to correct mistakes or gain some sort of power or knowledge.
Well, first, build interesting characters with depth and growth. Also, pay attention to the pacing of the story. Don't rush or drag it out. Another key aspect is world-building - make the fictional world vivid and immersive.
It's purely fictional. The plot and characters of 'Cruel Instruction' are the imagination of the writers and not based on real events or people. The story was crafted to engage and thrill the audience with a made-up narrative.
Well, start by having a clear story idea in mind. Then, sketch out your characters and their designs. Also, pay attention to panel layout and composition for a good flow.
I'm not entirely sure as I haven't read it in full. But generally, a 'past life regressor' type of light novel might be about a character who somehow regresses to their past life. It could involve things like using knowledge from the present life in the past life to change events, gain power, or solve mysteries.
In a 'past life regressor novel', the main character is, of course, the one who can regress to past lives. This character is usually on a quest of some sort. There could also be a love interest, someone who has a connection to the regressor's past and present lives. And then there might be an enemy, perhaps someone who fears what the regressor might change in the past that could affect the present or future. For example, in some novels, there could be a powerful wizard or a corrupt noble who wants to keep the status quo and thus tries to stop the regressor.