ANSWER: its from a hentai called Oni Chichi 2: revenge, the gif is from episode 1 of the series. here is a link to the series;

ANSWER: its a hentai called Crimson Girls: Chikan Shihai, the pic is taken from episode 1 of the series at around 3:43. here is a link to the series;

ANSWER: its a hentai called Haha Musume Donburi Oyakodon: Oppai Tokumori Bonyuu Tsuyudaku de here is a link;

ANSWER: its a hentai called Sei Yariman Gakuen Enkou Nikki, this picture is from around 9:33. here is a link:

ANSWER: its from a hentai called Tennen Koi-iro Alcohol. here is a link

ANSWER: the hentai is called Rin X Sen + Ran-Sem Cross Mix. i think its from episode 1. here is a link to the series;

ANSWER: its an anime called The Hentai Prince and the Stony Cat or Hentai Ouji to Warawanai Neko. here is a link to the series;