My roommate picked up a small white snake and wanted to keep it in the dormitory. I advised her that snakes in the wild are not safe and pets cannot be kept in the dormitory, so she should send it away as soon as possible. But this snake actually understands human nature and hates me for it. After that, unknown foreign objects kept appearing on my bed until I brought my sister to the dormitory and the white snake took the opportunity to bite her. I wanted to protect my sister, but my roommate stopped me and let the snake go. Many years later, when I returned home, I saw a house full of venomous snakes when I opened the door. Something happened to my family and I was also in danger. When I opened my eyes again, I went back to the day when my roommate picked up the little white snake.