Lěngxiě Zhèng Shǎizǐ

The protagonist, Metaro, is a teenager who has committed a felony and went to jail. In prison, a mysterious man put forward an idea. The two escaped together, using dice to choose one person to be the bait to help each other escape. After losing to men again and again, Mutaro entered a new world that was stable but distorted. In these worlds, he will become a second-year student in the "Private High School of Knowledge" high school, and become a primary school student with Qiqi and Xuemaru. Then, the girls suffering from cold blood will be played and persecuted one by one... His fate will be determined by you.