TBH appears again before Ichiro and the others. They say that if they're beaten in a rap battle, they'll spill everything they know. Ichiro, Samatoki, Ramuda, Jakurai, Kuko, and Sasara accept the challenge. After the battle, the mastermind is revealed.
What's this "cleaning certification" 
thing supposed to mean?
ما الّذي يفترض أن تكون "شهادة التّنظيف" هذه؟
Was will ich mit einer Aufräumprüfung?
¿Qué es esto
de "certificación en limpieza"?
¿"Especialista en acabados"?
C’est quoi, ça ?
Un « certificat en nettoyage » ?
Che significa "abilitarsi a fare le pulizie"?
O que é essa certificação de limpeza?
Что ещё за аттестация на уборщика?