Kanto Girls Rehabilitation Center is a detention center for girls under twenty. Miki Saotome spent time after being transferred from her previous facility here before it was given new ownership by Director Shirakawa.
The center functions by getting their inmates back into society after a certain amount of time. It features a cafeteria for meals and an education center for classes. After Director Shirakawa took command, the boiler room was changed for punishing girls who broke any of simple vice rules. When Shirakawa used this to torture anyone who stood against him, he and his associates fought against Miki as Sister Miki while getting killed by her and the Center burning to the ground from the damage in the fight.