If I Am the Only One in the World, It Is Not a Lie

With windows that couldn't be pushed open and doors that couldn't be opened, I was trapped in the room and couldn't leave. In a world where I am the only one, the letters I write every day will be sent away by the gods, and when I wake up, I will receive letters from strangers. I have a hunch that if I keep writing, I will be able to remember important things and maybe be able to leave this place.