Monsters vs Humanity MVH

Roy lived peacefully in his village for all eighteen years of his life and planned to spend another hundred like this. Unfortunately, his village was attacked by an unknown to him back then race - humans.
He was the only survivor who escaped thanks to a system that helped him get out.
After leaving it, he just wants to live his life peacefully, aware that he doesn't stand a chance in a fight against humanity, but the system pushes him further and further onto a way of no return where he meets new friends and enemies.

With his baggage of new experiences, Roy slowly changes from a lazy young adult who just wants to read books into a leader of monsters and starts a war against humanity!