The story is good, but you removed the thing that makes us read fan fiction, which is the original anime characters. So, it’s a good story, but I don’t consider it fanfic.
Well, I've read up to chapter 40. I want to ask if he actually sacrificed his sister or not because I find it illogical that he would be reincarnated and then oh, I will sacrifice my sister to gain power. I will leave the novel if he actually sacrifices her, so tell me.
Author, you are repeating the same idea in multiple novels. I believe it would be more effective to focus on one novel at a time until it is finished, before moving on to the next one.
While I wasn't particularly fond of the book up to chapter 20, I acknowledge that my recent low spirits may have influenced my perception. Therefore, I'll take a break and revisit the book later with a fresh perspective.