Itazura Katei Kyoushi ~Misshitsu no Waisetsu Shidou~

Yasuko Sakamoto is studying to to become a teacher. As a part-time job he is a tutor for Yuki, the eldest daughter of a nobleman. She is however rebellious and he is finding that he is not as good at teaching as he once though.

One day a envelope arrives in the mail. There is nothing in it but a DVD. When he puts the video he sees a familiar room. It was Yuki's room.