Genius of the Unique Lineage is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

I want to be someone who kills invaders __ I want to kill invaders and live a happy daily life in a special world. Can’t I just ask for that? Why? Why can’t I do that? People say chasing two different rabbits will make you miss both, but… just don’t miss them.