"The School Ranch Project".

When I entered this seemingly ordinary school, where I had the impression that many of the students were the sons and daughters of wealthy families, I had no idea that such a dangerous plan was underway. A ranch may sound like a tranquil place, but this is not the case with this project. The livestock they are going to raise there is none other than the students themselves - or, to be more precise, female students.

It was only recently that I, Ryuji Nozaki, learned of this plan along with the secret of my birth. When my mother told me that his father, whom I had been told was “dead” for so long, was actually alive, I honestly thought, “Oh, so that's true after all,” and was not that surprised.

However, when I found out that my father was the head of the foundation that supported the management of the school and a resident of the underworld who was promoting this illegal project, I could not help but be astonished. Why did she suddenly reveal my father's existence and tell me such a thing?

The answer was that I had been chosen as the heir apparent to my father. My father, whom I had never met before, was an unparalleled lover of women, and in addition to my mother, he had had relations with a number of women, some of whom had fathered children. Somehow I had caught his attention.

As a result, I was suddenly made aware of my hidden identity and told that it would be a good idea if I were enrolled in the school, and entrusted with the promotion of this “school ranching project". Suddenly, my daily life at the school has changed completely. But perhaps it is because of my bloodline. Amid this darkening world, I was strangely driven by a destructive impulse and felt myself enveloped in a unique sense of elation.

[Translated from the game's website]