TMNT

Instead of the traditional 4 male turtles fighting shredder and others, the world changes to 5 turtles, the traditional 4 of Michelangelo, Leonardo, Raphael, and Donatello, but then the fifth turtle, technically the 4th since she pushes Donatello back into the fifth. Her name is Gogh, named after Vincent Van Gogh, and unlike her sisters in this timeline, she isn't just a girl, she's a futanari turtle who grew up alongside her female turtle sisters and male stud of a father.

With a massive cock and a high libido, Gogh wields a Yari and often collects pornography to hide for herself, existence greatly changes the story due to her libido and constitution creating so much cum that her mutagen-altered seed impregnated and mutated multiple entities, creating sexy milfs, bimbos, and other such voluptuous women who want Gogh's cock in a yandere sort of way. Gogh and her sisters fight these ladies off, occasionally getting enticed by Gogh's member and cum but narrowly resisting or taking a moment to have a quicky. Eventually, after subduing and "fixing" these women, Gogh creates a loyal and obedient harem as a side/main plot to the story that finally bends her sisters over and breaks their mental resistance, submitting themselves to Gogh's cock, leading to Master Splinter finding out this relationship and whipping out his dick to join them.