Rei

the school of gambling •°•°•°•~Rei~ •°•°•°• Rei lives in a school where gambling is everything. Everyone knows, and nobody does something against it. If you win the students like and respect you, but if you lose, you become a worthless pet. Boys get called dog and girls pig. The student council watches over the money and makes the rules in this school. Rei is the leader of the student council. He is cold, ruthless, and calculated. He knows that nobody will dare to talk back. Not even his closest friends, which are more likely his subjects, do this. He only accepts games against students with very much money, against the students from the student council and against pets. But the thing is that almost no rich student neither a pet is brave enough to face Rei. . Can you guess the anime?