Sinful Vampires

Sinful Vampires is an adult visual novel set in a very dark futuristic world.
The protagonist of this story is a young scientist who is an expert in genetic engineering.
Through a series of unforeseen events she will be transformed into a vampire by the seductive Jill.
Our protagonist will then begin a new life in the form of a vampire.
Things, however, will not go as she expected and she will find herself investigating a mystery.