Futanari girls from the cartoon Avatar: The Last Airbender
The only futanari i could find for One Punch Man, i gues ill update this when the artist continues it (TheGoldenSmurf). I also uploaded some gifs that are very nice.
Kind of a mess but whatevs.
Some quality Korra art or as some call it rule 34. Also there are futa comics in the comics section: Avatar
Avatar The Legend of Korra Shower Time Futanari Comic
Avatar The Legend of Korra White Glove Affair Futanari Comic