He had signed as a guarantor for a friend's loan and then his company went bankrupt, and he disappeared. He was left with debts so huge he couldn't even tell his family. Right as he was in the pits of despair he heard about a certain weird job. Drawn by the promise of hefty payments, he visited Seika Girl's Private Academy and that's how he became an official Seika Gigolo.

Seika Girl's Private Academy has a dark secret. All of the girls at this school are from prestigious families and thus have never dated... even once. 
 
So the school had to come up with a way to make sure they didn't get too overwhelmed by their urges...

A prestigious school can't let its students have sex willy-nilly. That'd be irresponsible. Instead, it'll provide them with pre-approved, school-sanctioned gigolos.
 
(Source: Irodori Comics) 
Notes: 
- Originally self-published under the name "Seika Jogakuin Koutoubu Kounin Sao Oji-san (聖華女学院高等部公認竿おじさん)". 
- A live-action AV adaptation (EBOD-918) was released on June 21st, 2022.