My Friends' Mothers -Forbidden Parents Day at School Suspicious Tripartite Meeting- Yukari Orihara Nami Horikawa Naho Hazuki

On their sons' school observation day, three women—Orihara, Hazuki, and Horikawa—were told by the homeroom teacher to stay until after school for some reason. After school, the teacher revealed the shocking fact that their sons had such poor grades they couldn't graduate this year. Desperate, the three women seduced the teacher with sexual favors and barely managed to get retake exams allowed. However, as a special case, only one could graduate. Determined to have their own son graduate no matter what, the three mothers began seducing the other two sons lewdly to hinder their studies. Unaware that they were all doing the same thing to each other...