Otoko ga Yajuu ni Mezameru Hi: Nihonjuu de Free ni Kozukuri Shimasho☆
The year is 20XX. Japan has entered an unprecedented age of declining birth rates, and the government's countermeasures have all failed... As a last resort, a new experimental law will be introduced, implementing a "free sex day," which some fear will turn men into uncontrollable animals. Ayuri, a student at an all-girls university, and her handsome boyfriend Satoshi were a couple that remained true to their pure love, but will they be dragged into this madness and have their relationship torn apart!?
(Source: Renta!)
