Seishoku Ryoujoku ~Onna Kyoushi Kan'in~

The main character is the principal of a private high school. The story all begins when someone discovers and exploits the weaknesses of the beautiful teacher, Nada Ryoko. Our main character becomes an unintentional witness to Ryoko kissing a student...and burning with jealousy, as he wanted Ryoko all for himself, the main character decided to uses this incident against Ryoko, extorting her so that she becomes his! To completely shatter the teacher's ego or not... it all depends on YOUR choices.