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...
You'd better keep your promise.
.من الأفضل أن تحافظ على وعدك
halte dein Versprechen.
más vale que cumplas tu promesa.
más vale que cumplas tu promesa.
Ti conviene mantenere la parola data.
É bom cumprir a sua promessa.
сдержи обещание.