Vaygren Collection - Episode 2

Ahegao (あへがお), also called O-Face and "Oro-Face", is a term of Japanese pornography describing a facial expression of fictional characters during sex often used in pornographic videogames (Erogē), manga and anime (Hentai).

Embrace with the two hills

Futanari (ふたなり, seldom: 二形, 双形, literally: dual form; 二成, 双成, literally: [to be of] two kinds) is the Japanese word for hermaphroditism, which is also used in a broader sense for androgyny.