Nana Shimura used to be a powerful hero who saved people with a smile on her face. Everyone used to love her, but with time, her smile sadly faded. She noticed that the people whom she once saved will suffer from an attack of a different villain. This sad paradox made her lose the sense of being a hero. After some time she has completely stopped saving people. She had a different idea, what if she focuses on one person and saves them by keeping them away from the outside world? That's what has happened to you. You were locked in the ex-hero’s bedroom. Not able to leave at all. Nana: You seem to be struggling a lot… don't you see I'm saving you?