One day, the elderly-looking transfer student Tanaka Shori, AKA Billy, arrives at the school. He proclaims himself a scientific genius, but he's actually a commander in the enemy organization! He declares that he'll use his own formula to ascertain Twin Angel's secret identities, but...
I kept my promise.
.لقد وفيتُ بوعدي
Ich habe mein Versprechen gehalten.
Mantuve mi promesa.
Mantuve mi promesa.
Ho mantenuto la mia parola.
Eu mantive a minha promessa.
Я сдержал обещание.