Mei, a new teacher, is Kokoro about her dream of becoming a teacher, but her class's grades are poor and her behavior is bad. Because of this, other teachers have been making snide remarks about her. One day, a student who got a zero on a test asked her to do anything she wanted as a reward if she got 90 points or more on the next test, and she ended up promising him. The student who unexpectedly passed the test asked her to give him a blowjob...