Haramase!! Ninshin Paradise

The company that Takeshi Yokoyama joined has gone bankrupt. A few days later, he meets Seina, a woman who had been his partner at the soap. She is the daughter of a well-known family and a civil servant who belongs to the Blood Sugar Control Board! Takeshi's semen is a "golden semen" worthy of remaining in the bloodline of a prestigious family, and he takes on the job of impregnating the daughters of the family!

(Source: Mujin Comics, translated)

1-6. Totsuzen, Haramase Koumuin (突然、孕ませ公務員); Comic Mugen Tensei 2023-02, 03, 05, 07, 10, 12