Have you ever had such a dream? In the dream, everything is so beautiful and unreal, but the pain is so painful that you can't ignore it; everything is so real, so real that you can't believe it is real. Everything there is strange, but you feel so familiar, as if you have lived here in your previous life. You like it here, you feel that you belong here, but everyone around you tells you that this is just a dream, a dream that does not exist at all. Do you believe it? If you still had the chance, would you still pursue this dream?