16-year-old Sawada Tsunami wakes up one day to find up she now has a sadistic tutor in the form of an infant. Tsuna's hiding a bit of a secret from her family, though. It's not like she could just tell her mother, let alone her father, that she's in charge of a Yakuza group. First attempt at fanfic. Rated for later chapters. Crossposted from AO3. Fem!Tsuna/Guardians eventual rom