Doutei na Joshi-tachi to Boku ~Moshi Kari ni Man ga Ichi, Boku ga Ecchi ni Kyoumi Shinshin na Douteippoi Joshi Bakari Iru Sekai ni Itta to Shitara~

All of a sudden, Yukito is transposed in a distorted reality where the (sexual) outlooks of men and women are reversed, men are shy and reserved and usually wait for the women to make the first move and women are outspoken, sexually aggressive and indiscriminate. Later, he's told by a demon catgirl that in order to restore the world back to normal he needs to impregnate someone, but there is a catch...