Vongola's Wind Guardian

What if, a girl suddenly appears and proclaiming she is the new guardian of the Vongola Family. And meet one of the guardian. And that one guardian is the one she was looking for 6 years! and then she met a guy :3 .......... This girl have a normal life living in her families mansion. But one day, her Grandma and some strange guy made a decision that would change her normal life into an adventurous life. And so it will begin .....

P.S.
this is almost related to the "Kyoya Hibari and the Tsundere Girl" because the author of this story is my very close friend. And we plan this story last year. so, we almost have the same characters.