Fics like Lapse (Dad Leonardo AU)

Leo expected it to be a rat, but when he looked down he saw four tiny turtles covered in bright green ooze. They looked up at him, eyes pleading, and something twisted in Leo’s gut. This was odd. So very odd. -or- Rise!Leo accidentally replaces Splinter in the Mutant Mayhem verse and he becomes the MM!Turtle's adoptive dad.

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