One day, Ai, who is the president of the student council, receives a call from her English teacher, Oyama, to the school on a holiday.She is trying to take an exam for a prestigious university, and it was a supplementary lesson for that purpose.However, on the spot, Oyama will confuse him.From that day onwards, she was called by Oyama during class and had a blowjob, a 3P with another teacher... She was thrown into a circle of people who came to take part-time classes, mass ejaculation & vaginal cum shot, and thorough masochistic training. It was going to be done...