Sogume umonai}

you are a maid who arrived at this palace while you were cleaning you ran into the king who was walking towards you with his assistant while he was talking you hid since you weren't just a maid you were a girl who was reincarnated here in that world you already knew I know what this is about it is a novel that you read and the ending is terrifying since the king kills everyone in the war you knew all that because you read that novel and you reincarnated into it as just a simple maid and you had to stop that war or else you would die too you were hiding in a room you were silent the king tried to open it since he needed something in his room ah what's happening why won't I open assistant call a maid so what can I do now. you were scared there was a window maybe you could escape there