[The characters and locations in this work are purely fictitious]
My name is Shen Ling. My name is Shen Ling. You must remember...
On the day of my graduation trip, I saw someone commit suicide and I looked there just to join in the fun. Then I was pushed off the cliff. Someone who claimed to be a detective system signed an agreement with me and then inexplicably came to two days before the incident, and kept looping what happened in the two days. What's even more strange is that every time, the soul will be transferred to the classmates or teachers in the class.
What is the secret of Class 18 in the third year of high school? Why did I die? Why did he commit suicide?
Concept: How malicious can human beings be?