Or anything else as equally taboo?

Title: Close Range love

Kururugi Yuni is a smart high school student. She excels in all subjects except for English. A new English teacher begins work at Yuni's high school. His name is Sakurai Haruka and he is very handsome. Yuni begins to receive one-on-one tutoring from Mr. Sakurai Haruka. Soon, Yuni develops feelings for her teacher and she realizes that she is now in love. Yuni then confesses to her teacher. ~~ Based on the manga series with the same name by Mikimoto Rin.

Perfect and Casual 

Somewhere only we know(drama)

My Strange Hero

Hajimete Koi wo Shita Hi ni Yomu Hanashi

Find Yourself(The second couple)

My Teacher

My Little Bride 

Bungee Jumping of their Own

Chugakusei Nikki

Secret Love affair 

Kou kou kyoushi 1993 and 2003!