The first of the young devils gathering is a battle between Sona Sitri and Rias Gremory inside of a recreation of the mall located near the Kuoh Highschool. The rules of the match is that the participants are not allowed to destroy the environment, putting the Gremory Group who specializes in powerful environment destroying attacks, at a sizable disadvantage, and the second rule is that Gasper isn't allowed to use his Sacred Gear or drink Issei's blood.