Gakuto is keeping his class observation day from Hayato by using a stand-in. 
Mr. Yuzuki, hello.
Oh, Yuzuki-sensei! Hallo.
Oh, buenos días, profesor Yuzuki.
Ah, bonjour, M. Yuzuki.
Salve professor Yuzuki.
Olá, Yuzuki-sensei.
О, учитель Юдзуки, здравствуй.