The Main Heroines are Trying to Kill Me

In a desperate bid to rescue the despondent Dark Fantasy World, I fought back tears and brought about its destruction. Following that, I vanquished the Demon King and made my return. Armed with the System acquired through the Regressor's Privilege, I now strive to save the world. However, complications arise as the main heroines regain memories from the previous timeline. It's proving to be quite a challenge.