The head teacher suddenly pulled the whole class into a group called "Happiness Theory" and released various tasks every day. At first, everyone was very excited. The public tasks allowed the class to win prizes, and the individual tasks helped students express their success. Until that day, a personal assignment required the monitor to tear up the scholarship applications of poor students in public. Mission rewards are becoming more and more attractive: cash, guaranteed qualifications, and even one day of life. The penalty for failure changes from minor social death to "your deepest fear." Li Mo, a transfer student, discovered that someone in the group began to post a private task of "killing his deskmate". And the administrator who is always silent has a picture of the senior who committed suicide three years ago...
