——When everyone leaves me. I am just a passer-by in this book, and he is the only one I see. I don't know what the situation is like for other time-travelers. After dying and waking up, "I" lived in the brain of a teenager. I was ecstatic at first, thinking that I could have life again. I was not afraid of death before I was alive, but I was deeply afraid of death after death. Doubt, irritability, anxiety, despair - this is a summary of my future days. Because I discovered that if I didn't have expectations at the beginning, I wouldn't be so desperate now…