Source: IMDB
In Ep12 Hidemi Ohta tries to make Eikichi Onizuka her slave which had worked before with her tutor Teshigawara .
It doesn't go down well with Onizuka.

IMDB: https://www.imdb.com/title/tt0315008/
Clip: https://www.youtube.com/watch?v=P89hWnrSFw8