Mitsuko Akahoshi. 21 years of age. Subject 450, current guinea pig of Jonathan Parvones of the Parvones Famiglia. Objective? Infiltrate and eliminate Vongola Famiglia's 10th generation Mafia boss. That was her mission, a simple walk in--walk out objective. Yet, somehow she managed to fail that mission. --- After the events of Tsuna's training as the Vongola Famiglia's newest generation boss, he was finally able to break out of his awkward shell and become a true strong and silent leader. But suddenly, a girl plagued in black just suddenly appears in the gates of the mafia front door? What are the chances that the very enemy of the Vongola Family is actually someone they would soon come and care about. How would you suppose the story's ending is? Good, bad..maybe neither. It all comes down to one's ammunition. -- Hello! Another booksie here. Because why not? I got into Katekyo Hitman Reborn, that I wanted yo make a fanfiction about this. So here it is! Yay. Anyways, Ciao!