Zettai Junshu

In a not-so-distant future, humanity faces the precipice of extinction due to an alarming dip in male birth rates. In an ingenious attempt to combat this crisis, the government has instituted the Free Sex License - a revolutionary document that empowers its bearer to engage in intimate relations with any woman they choose, legally binding her to fulfill their carnal desires. Our protagonist, Takumi, finds his life turned upside down when he unexpectedly acquires one of these licenses. With the help of Sara, an intelligent and sexually curious young woman, he embarks on a journey that forever alters the course of his existence. Along the way, he encounters Misaki - the beautiful and enigmatic elder sister of his childhood friend Rin. As their unconventional relationship blossoms, Rin finds herself consumed with jealousy and heartache as she watches Takumi's ever-growing connection with Sara and Misaki. But when a chance encounter leads to an embarrassing incident in the classroom, Rin is forced to confront her long-suppressed desires...