I saved a sex slave and she will be my new friend.

After defeating the Demon King, the only thing I want is to live a quiet life. A normal life... Although it's harder than I thought. My dream is to have a girlfriend and have friends. As long as I manage to fulfill one of those dreams, I will die happy. One day, I killed a group of bandits and rescued a sex slave. I turned her into a Vampire and gave her a new life. "You will be happy again, I promise!"