That time the Earth was Conquered

-It's strange how everything around you, reality itself, can change so quickly, without even realizing it. Now, what will my goals be, now that I don't even remember who I am ...

they had eliminated the "me" of * years ago? Either he was just trapped somewhere in me, or even now I was myself without realizing it? -

Year 20**, the earth is conquered in the blink of an eye by an intergalactic empire, making the Earth their source of entertainment.