Kawabata Ryou

Likes older women, basically considers girls his own age "kids".
Has his eyes set on female school faculty members, so he can have various acts of sex with them.
When he got involved with one of such teachers - Yuuna - he got caught, and was expelled.
And so he transferred over to a neighbouring school. This did not stop him however, and he continued to hunt for new prey with a burning ambition in his heart.
Because of his expulsion from the "Teacher Training" affair and transfer he's repeating 2nd Year.