Tesuta ~Teach & Study~

Naoki is a high school student. His parents are abroad on business, and he enjoys living alone. As a result, his midterm exams are terrible, and his father, who comes back temporarily, gets mad to see it. His father decides to put him in a school dormitory if Naoki doesn't take good results in the end-of-term exams. His father hires a tutor for him, and a beautiful girl comes to his house as a tutor. Her name is Yuko, never had tutor experience. When they are studying, she suddenly pushes him and sits astride him and.... His hard study life starts like this... involving his old friend, Kazumi....