Gesu Mama Futei Nikki

The first installment in an omnibus series: An Adulterous Diary of Lewd Housewives set in a certain Kindergarten.

Risa Kuriyama, a user of the aforementioned kindergarten, harbored a perverted sexual fetish that she could not tell anyone. One day, her fetish is witnessed and secretly filmed by Nashio Kohoku, a man who works as a janitor at the same kindergarten.

Kohoku calls Risa to the janitor's prefab office, shows her the video, and threatens her: "If you don't want this video to go to the police, have sex with your husband, and then come to the janitor's room tonight."

Risa Kuriyama was a former career woman and an elite. Her pride was immense, and she looked down on all men, including her own husband. Nashio Kohoku, the janitor, was a man of the lowest standing, ugly and repulsive in appearance. Risa is blackmailed by this man and forced to endure one humiliating command after another.

Risa's pride is progressively destroyed by Kohoku, until she finally crosses the line of her own free will...

The pleasure given to Risa during her affair with Kohoku begins to corrupt her, and the unbearable lust drives her to even further acts of infidelity...

And then, a new man appears before Risa...