Adult PC Game: Unexpected Expectations v1.8.5 by Pravitas Archive

You are a 20 years old young man, who lives with Kelly, Sarah and Anna. During a hazing challenge for your new course, you get into an accident that causes you to become infected with a parasite called Pravitas. To your knowledge, the Pravitas is impossible to be removed and requires hormones released during sex to remain alive. The more hormones the Pravitas absorbs, the stronger it becomes. The stronger the Pravitas becomes, the more it can do.
In this game you start out as an innocent virgin, but as time goes on the Pravitas will slowly cause you (and those around you) to become more corrupted, releasing the inner desires and eventually even fabricating desires in order to facilitate its food intake (a.k.a sex hormones).
This is a game that aspires to have an actual story line, instead of just fucking for the sake of fucking. The style of the game will be a sandbox of sorts. Time cycles will be used, as well as stats and money. The game will eventually have quite a lot of random events.​

Unexpected Expectations v1.8.5 by Pravitas Gameplay Preview