[Nearly invincible (not completely invincible, since he still has opponents) + no female lead + half-mad protagonist + incredibly powerful body + cheat tool]
This is the story of a nearly invincible boy who reshapes the world in his own way. His methods may be bloody, but they are proper. Here’s the novel’s premise.
(This book is also called I Don’t Want to Get Stronger Anymore.) Li Li had no memories when he woke up, but fortunately, there was a book that had appeared alongside him in his mind. It called itself A Shu, and worked much like a supercomputer (but not a System).
Every day, Li Li would wake up inexplicably stronger. Unable to adjust to his rapidly growing power, he often hurt people by accident, which left him very troubled.
Li Li had no real goals in life, because before he could even set one, he’d automatically grown stronger. Nor did he have any grudges, since he always settled them on the spot. A novel with so little conflict must be boring, right?
Thankfully, Li Li’s greatest quality is his good manners. He also enjoys helping others break their bad habit of being rude. And so begins the story of a boy who transmigrates across multiple worlds, bringing a new culture of civility and courtesy to each one.
Not bad, there is no bloody or forced subjugation plot, it is comfortable to watch
Interesting, what's next?