"Dear classmates, welcome to the "Seven Days of Dormitory Survival Game". Please ensure your own safety during these seven days, find out the joker hidden among the classmates, and vote for the joker you think in the voting every night and lock him/her in a small dark room. Please note that only the inside of each dormitory is safe. Please go together in the corridors and the small supermarket on the first floor, otherwise you may be killed by the dormitory and jokers."
"After seven days, the dormitory door will open automatically. Then, students, the game begins..."
Concept: Seven days of quick "comradeship"