Chishojo Fuuki Iin no Minna ni Ienai Inbi na Onegai 9 ~Harabote Harem 4P to Sogyoushiki no Himitsu SEX~

The protagonist, Takumi Fukami, is engaged to Saki Asai, a member of the public morals committee. They, along with Saki's sister and mother, are all pregnant with Takumi's children. Takumi studies hard for his university entrance exams with Saki's help, often receiving sexual rewards for his efforts. After successfully passing his exams, Takumi is invited to the Asai household to celebrate his graduation, where he is greeted by the three pregnant women in bridal lingerie for a celebratory foursome. Takumi engages in a foursome with Saki, her sister Shiho, and their mother Miki. They take turns having sex with him, with all three women being pregnant. Later, Takumi and Saki have sex in the disciplinary committee room after the graduation ceremony. Takumi and Saki have sex in the disciplinary committee room after the graduation ceremony. Saki is heavily pregnant. Later, Takumi visits Saki's home and proposes to her with a ring, which she happily accepts.