Oushun Jogakuen no Danyuu 1

Oushun Girls' Academy is a school attended by young women from noble families. The protagonist is hired there as a janitor. However, that is just his cover. His true role is that of an "actor". All the students are from wealthy, high-society families. Scandals are strictly forbidden. Consequently, the female students' sexual desires are all the more intense and twisted. His job is to play the role of their "ideal man". That is the duty assigned to the protagonist. His first client is "Saeki Ichijou". She is the student council president, excelling in both academics and athletics, and comes from a prestigious family that has even produced a prime minister, a person truly destined to lead others. However, she harbors a secret sexual fetish she cannot reveal to anyone. To satisfy her, the protagonist plays a role: that of her "ideal man"... her "Master".