Gakuto is keeping his class observation day from Hayato by using a stand-in. 
Mr. Omi, good work today.
Ōmi-sensei! Gute Arbeit!
Buen trabajo hoy también, profesor Oomi.
Bonjour, M. Ômi.
Professor Omi, salve a lei.
Omi-sensei, bom trabalho.
Учитель Оми! Добрый день!