Dorei Yuugi Guren

One day, Kai, a normal high school student, receives an email inviting him to try a mysterious new cellphone game. But the people whose picture he takes with the application, "SLAVE GO," go missing one after another... A vicious and cruel game begins...!

Unable to give up his dream of becoming a novelist, Row Kadoma, works part-time as a security guard with a lethargic attitude. At his job, he meets Ebe, a Roppongi celebrity, and they play a little game, not knowing that it will open the door to a world of immorality… A "slave game" of extreme depravity, toying with people's lives, is about to begin! (Source: Shueisha, translated)