My take on the gross episode 10
Well same as everyone, I feel very gross watching this episode. But after some few hours of thinking about it, I think its an extremely controversial episode but have it's own merit.
By the end of the episode Kotone and Ryunosuke put their relationship on hold. Onizuka and Kashiwabara did not stop kotone or push kotone for the relationship, they tried to be emphatic and told Kotone to finish school and be an adult, before pursuing her love again. Telling Kotone what she's doing is wrong is text book and will only push her away.
In conclusion, it is implied in 2 years both Ryunosuke and Kotone will forget each other. YES, Ryunosuke is not 100% a saint but at the very end he resist to abuse Kotone feeling and refused to show his affection to Kotone, thus implying they "broke up" and will forget about it. And in the final episode Onizuka last speech to Kotone is to think about Ayumu.
I also liked Ayumu involvement in that episode.
So as I said earlier, I think this episode is trying to address a very controversial and real live scenario. While this topic is especially relevant in Japan, but also I saw tons of gender reversed news from US. I do feel gross out throughout the episode, but ultimately this is my takeaway.