Shin Sei Yariman Gakuen Enkou Nikki The Animation
Japanese title: 新・聖ヤリマン学園援交日記 THE ANIMATION
Type: OVA
Episodes: 1
Source: Visual novel
Genres: Hentai
Studios: Seven
Producers: Pink Pineapple
Duration: 23 min
Rating: Rx - Hentai

Based on a doujin game by Orcsoft.

Saiki Yasuo is a 45 years 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: English DLSite)