Immoral

Immoral is a Japanese erotic visual novel about a school doctor who uses an aphrodisiac spray to bend women to his will.

The protagonist is Takeshi Okamura, a high school doctor who is secretly attracted to his student, Kyouko Adachi. While attending a doujinshi sales event, Kyouko and her friend Manami witness Takeshi buying an erotic doujin, which only worsens his already slim chances of getting with her. On top of that, Takeshi learns that Kyouko has agreed to date a boy who confessed to her at school. That night, while Takeshi is drunk in the city in despair, he is given an "aphrodisiac spray" by a mysterious old man who claims that it will make any woman unable to resist him. When he tries it out the following morning on the president of the sports club, Ayano, he is shocked to find that it actually works, with Ayano now begging him for sex. With a wicked smile, Takeshi plots to make Kyouko his.

It's up to the player to decide whether to pursue Kyouko, or another girl, or as many girls as possible to create a harem. The player must be careful about where they use the aphrodisiac spray because their target can flee before becoming too aroused if they are in a location with an easy escape route or a lot of people nearby. How the story ends ultimately depends on the player's decisions.