Brain Concentration Camp

Why do you feel familiar when doing certain things? Why did my deceased grandfather suddenly give instructions in my dream? Why can I sometimes control my dreams but sometimes I can't? How to define reality and fiction? Everyone experiences it, but no one takes it to heart. If you have questions about dreams, you will get the answer after reading the protagonist's personal experience. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.