Ore dake ni Kashizuku Haramaid-tachi ~Seishi o Musaboru Gonin no Yokushin Onna~

The protagonist is a male student attending school. He has a twisted personality, no friends, and is disliked by both men and women.
Living alone with his mother, he leads a harsh life with no hope for the future, spending his days in gloom.
However, one day, his life changes completely. On his way home, a luxurious limousine suddenly stops in front of him, and an unknown beautiful woman accompanied by men in black suits appears and says:

Woman: "I have come to pick you up, 'Seedbearer'."

The women forcefully take the bewildered protagonist to a certain mansion.
The beautiful woman, "Kousaka Iyo," reveals a shocking truth to the confused protagonist. This place is the private residence of the famous company "Tenkuin Shoji"'s president, and that president, "Yoichiro Tenkuin," is the protagonist's real father. His mother was once a maid in the Tenkuin household, got pregnant by Yoichiro, and was ordered to abort to avoid future troubles, but she refused and disappeared from the mansion. Thus, the protagonist was born. He was astounded as he had never been told about his father.
Moreover, the reason for bringing him here is explained. Successors to the president have met with misfortune one after another, leaving no one to carry on the family blood. Yoichiro, being elderly, can no longer have new heirs.
Therefore, they have chosen the protagonist, even though he is an illegitimate child, as he shares the same blood.

Protagonist: "So, you want me to become the successor...?"
Iyo: "No, not at all. Our company's AI, 'Demeter (Goddess of Fertility),' predicts that if you become the successor, the group would collapse in no time."
Protagonist: "Huh...!? Then what should I do?"
Iyo: "We want you to produce an heir."

In this mansion, there are maids prepared for the protagonist, and they are to bear his children to create an heir. Each maid has her own compelling circumstances and is strictly ordered to comply with the protagonist's commands.

Iyo: "If you have children with them, an excellent heir will be born, and the group will prosper even more... according to Demeter's predictions."
Iyo: "I recommend you follow the predictions and embrace them."

While being treated like a stud isn't something he likes, with the opportunity to do whatever he wants with beautiful women... there's no reason to let this chance go to waste.
Thus, the protagonist, who had lived in the shadows until now, fully utilizes his accidentally acquired position to enjoy a deprived life of impregnating sex with the maids.