A Broken Sky's Trust

Tsunazuhi Sawada or Tsuna. People call him "Dame-Tsuna" for he is No-Good. After an infant came to his life, his life changes. However, Natsuko Sawada, Tsuna's twin sister was taken by their father Iemitsu at Italy when they were 5. Natsuko was being trained by Vongola Nono and the CEDEF boss Iemitsu. Now that Tsuna is now 15, his sister finally comes back. Everything that Tsuna has will be taken away from her, even her guardians/friends. When they know Natsuko's real character, what will they do?

Fem!Tsuna
Warning: swearing/curses, wrong grammars and OOCness.....