From Osuwari Team:

Uni is a prodigy with a cool reserve who is accomplished in everything except for English. One day, she insults her temporary English teacher and he overhears her. He asks her to come to his office after school and, somehow, she starts receiving private tutoring from him?!

From Manga Abyss

Uni Kururugi is a straight faced high school girl who always wears a kitty hair clip to make something about her cute. Her teacher, Haruka Sakurai is a ladies man that all the female students want. But he is interested in Uni...