This is about Zack and Stacey from "Saved by the Bell".

Raphael was never one for family, seeing as his first one abandoned him when he was three. But when foster-care is running out of care-takers one man along with his three sons are ready to take on the challenge of this troubled teen. (Human AU)

Human AU. At the age of 6, one of Hamato Yoshi's sons was kidnapped. Now, 10 years later, what will happen when three longing brothers are reunited with their lost brothers. How will they give him a new, safer life? How will they react to the new Leonardo?

Bryce has lived in an orphanage for most of her life. Then one day, a man named Hamato Yoshi comes and adopts her. It turns out he has 4 sons that are quadruplets. Leonardo, Michelangelo, Raphael, and Donatello or Leo, Mikey, Raph and Donnie. They are all the same age as her and are in their 2nd year of high school as well. And it turns out they are also good at ninjutsu.