My slender, beautiful girlfriend was slept with and impregnated by my father. (Kuramoto Sumire, DASS-500)

Sumire and Kenji, newly dating, were like innocent, budding lovers just beginning to hold hands. One day, Sumire visited Kenji's house to greet his father, Kenzo. Although Kenzo joked with the young couple, he was instantly smitten with the polite and adorable Sumire. Kenji asked Sumire to cook for him on his birthday, and she prepared curry. Kenzo kept staring at her with lewd eyes. He secretly added sleeping pills to his son's curry and an aphrodisiac to Sumire's! He pretended to be worried about the excited Sumire, touching her as he spoke, saying that while his son slept soundly, he was like a wild beast…