I’m a Hero, but the Heroines are Trying to Kill Me 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

To save the doomed Dark Fantasy World, I gritted my teeth, destroyed the world, and defeated the Demon King, only to start over.
Now, armed with the “System” granted as my “Regressor’s Privilege,” I’m determined to save the world again.
But the main heroines… They’ve also regained their memories from the previous timeline.
Damn it all.