Zettai Junshu Kyousei Kozukuri Kyokashou!!

In the not too distant future, the male birth rate has plummeted, putting humanity at risk of extinction. To prevent a catastrophe, a law was passed on a "license for free sex." The holder of such a license had the right to enter into intimate relations with any woman at will, and the woman could not refuse him.

One night, Takumi found such a license in his hands, and his life changed completely.