With my entrance exams coming up, I've been studying every day. But then my teacher caught a cold and couldn't come. I can't afford to miss even a day of studying at this important time, so I ask for a substitute tutor. And the teacher who shows up is a beautiful, sexy teacher in a miniskirt. I've been abstaining from masturbation in preparation for the exams, and she unleashes her sex appeal on me with no mercy. Noticing that I'm struggling between reason and desire, the teacher moves from Japanese class to sex education class, provoking me.