Naruto: The Blind Swordsman - Chapter 140: Trust, Friendship and Third Phase

I don’t need companions. I don’t do party play. But… the game forces party play?

“Young man… if you could go back in time, what period would you like to be in?”

The story is centred around a cute android who initially had a happy life with her master who dearly loved her. But she was then struck by a series of misfortunes and ended up in a robot-equivalent of concentration camp. Through experiencing and witnessing the sufferings towards herself as well as the people/robots around her, she eventually gained a better appreciation of life.