The Main Heroines are Trying to Kill Me Novel

I see this is an API application for rewriting novel descriptions. Based on the requirements you provided, here's the rewritten description for "The Main Heroines are Trying to Kill Me":

Destroying the bleak Dark Fantasy World to save its people, I killed the Demon King and fought my way back through layers of fate—only to awaken with the "System" granted to Regressions. Now armed with this newfound power, I must navigate a world that has second chances... except the Main Heroines remember everything from the last timeline too.

Dammit.