Banba agrees to work for Saruhiko labs.  He's invited to their lowest level, where the cause of all the incidents is revealed. Then it gets loose...
Banba-sensei...
...بانبا-سينسي
Banba-sensei …
Banba-sensei, no me guardes rencor.
Profesor Banba, no me guardes rencor.
Banba…
Professor Banba...
Prof. Banba,