Sei Yariman Gakuen Enkou Nikki – Episode 1

Saiki Yasuo is a 45-year-old office worker. After 20 years of marriage, his wife asked for a divorce and left him. Now, depressed, he spends the nights drinking alone, until one night a girl from the St. Marian Academy approaches him looking for a client.

(Source: Vndb)

Alternative
Holy Yariman Academy Compensated Dating Diaries Saint Slut Academy Dating Diary Sei Yariman Gakuen Enkou Nikki The Animation 聖ヤリマン学園援交日記 THE ANIMATION 성 야리망학원 ~원교일기~