Alright, this story is kinda bad. First off, the main character has a system that rewards him for doing "ordinary" things. For example, making food, cutting logs, fetching water. Things that a ordinary villager would do. Thats fine and dandy, and theres definitely a way to make this into a novel, however this is not how you do it. Not far into the novel, the main character is fighting people left and right. Literally every other person he meets he ends up assassinating because they have some bad thoughts towards his junior sister who hes protecting.
First off, lets start with the story development. The female lead (main character's junior sister) is actually a genius who died, and then regressed back in time. The main character is a reincarnator. So, the female lead constantly gets into trouble, and it's not even funny. Literally every other sect wants to kill her, refine her into a pill, force her into being someones maid, etc. It's actually ridiculous. You see, the longer the story goes on, the more and more the main character is using his parody-level overpowered strength to assassinate people seventeen major realms above him, and it's just not fun to read. The main character literally gets stronger from doing ordinary things, it's fine if the main character occasionally goes out to protect the female lead, but it shouldn't be this much. It ruins the entire point of the main character staying low-key and having parody-level strength.
As for the characters? They suck, plain and simple. It's one of those "you dare kill me, young master of blah blah blah" then "you dare kill my son" then repeat endlessly until it's devolved into a massive war. Like what I mentioned previously, it's just endless conflicts in a novel that was originally a slice-of-life-cum-action novel. Now, it's just a action novel. The female lead is beyond stupid, it can't be put into words. Imagine being able to regress, and relive your life, and somehow causing even more problems than you did in your previous life. Female lead says shes going to protect her sect and senior brother, but ends up doing the exact opposite. The main character has to help her out from the shadows over and over again, which causes even more trouble. It's just endlessly repeating fights.
The world background is alright, average at best. The main character barely leaves his sect so theres not a whole lot to be told, even with him occasionally leaving to fight someone.
Overall, the plot and characters are rather poor, and it very quickly devolves into a endless-combat action novel. Which, believe it or not, isn't that fun to read.