Black Butler 15

Ciel investigates and concludes the principal of the school might have a clue on Derek's whereabouts. However, the principal only meets with the school's prefects forcing Ciel to win their favor. His attempts are sabotaged by Maurice Cole, a student jealous of Ciel's rising popularity. In retaliation, Ciel exposes Maurice's true personality and proves his innocence while winning the prefect's opinions at the same time. When Ciel brings up Derek's name into a conversation, the prefects are shocked.