With Him from Another World

That day, as usual, I fell asleep after taking the medicine. I fell into a deep sleep and couldn't wake up. The feeling in the dream was the same as in the real world, so real. A man with seemingly sunny eyes but a bit of melancholy broke into my world. When he saw me waking up, he stood up from the bed and grabbed my hand excitedly. This feels too real. Am I in another parallel world of time and space?