Koushaku Chakunan Koushoku Monogatari: Isekai Harem Eiyuu Senki

After spending his previous life as an ordinary Japanese salaryman, a man finds himself reborn into a fantastical realm defined by swords and sorcery. Rather than starting from nothing, he is reincarnated as the youngest son of a highly influential noble family, granting him immediate access to wealth, status, and authority in this unfamiliar world. As he grows up adapting to his aristocratic surroundings, his life takes a sudden turn upon reaching his twelfth birthday. On that day, his father unexpectedly summons him for a rather unconventional conversation. Instead of assigning him martial training or political duties, the patriarch issues a surprising directive: he instructs his son to learn everything there is to know about women, explicitly stating that he does not care whether those experiences are with common townsfolk or the maids serving within their own estate. Armed with his father’s explicit blessing and the considerable influence of his noble bloodline, the young boy fully embraces his new reality. He begins leveraging his aristocratic power and privilege to pursue his desires freely, setting the stage for an indulgent journey through his second life.