A pair of twins were born to Sawada Nana and Sawada Iemitsu. Two boys, one named Sawada Hatoshi, the other unnamed and abandoned.
Tsunayoshi (who prefers being called Tsuna) doesn't care who his parents are. Why should he when they abandoned him? Besides, a very nice and caring marshmallow loving albino adopted him and has been a perfect father. So Tsuna is content. Not to mention, he has seven ghosts that are his new brothers along with six other siblings.
A few years later, a certain baby comes to town, looking for someone that can fit a boss's position. And it just so happens that Tsuna moved to Namimori. And so, to the baby's luck, there is a perfect candidate that goes by the name Tsunayoshi Gesso.