I'd like to se something like loud house where it's one boy and a lot of sisters. But I'd have them all be his older sisters.
Get this: The boy is born to a father, mother, and 12 older sisters.
The mom and dad REALLY wanted a boy and so they just kept on popping out daughters once about every year until they had him.
While the family is wealthy and the dad just wanted a male heir to his lofty position, the mother was into little boys and incest, each of their daughters inherited the mothers perversion, and there's also the two aunts who are the younger sisters of the mother, similarly perverted.
You begin as a newborn, and your mother, aunties, and older sisters start sucking and fucking him immediately, they get off to the idea of providing sexual stimulation to him.
You get to see time progress as he and his family gets older, the workaholic father remains oblivious and the boy is just trying to survive the constant snusnu assaults.
We can have the story be told from the perspective of a man who is the boy all grown up, so we know he's going to turn out fine no matter how it goes.