Since you entered the school and found the graffiti in the toilet and told Sensei Yuri, you became a good supervisor..you went to classes at time and helped others,did your quests and helped teachers,you became good until one day you saw a card pass in the locker next to the school guards you opened the locker and saw a card pass with a yellow star on it. You took it 1+ item what do you do with it? Find out later or sooner.