It is my fault. Million Comics ihr Hertz

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

One night, Makoto Kiyomine, a high school teacher, was caught by Seiho when he was having an affair with a man. She took a picture of him in front of the hotel. On top of that, 美尋 Niiya, a student, took a picture of the moment. Later on, Niiya told Kiyomine, who asked him to erase the picture, that he wanted to "the teacher" as an exchange condition. Kiyomine completely forgot about it, but actually Niiya was the younger brother of the student Kiyomine used to be a private teacher?