Sei Yariman Gakuen Enkou Nikki

Saiki Yasuo is a 45-year-old office worker whose life falls apart when his wife divorces him after 20 years of marriage. Depressed and lonely, he spends his nights drinking alone, drowning his sorrows in alcohol.

One evening, a girl from St. Marian Academy approaches him, offering her services as a client. As he gets drawn into a world of paid encounters with students from the prestigious school, Yasuo must confront his own desires and the consequences of his choices.