Heavenly Destruction

Hana odayaka is the newest recruit in squad 13. Graduating from Soul Reaper Academy early, she was put in squad 13 for her exceptional Kido skills. however, she is very shy, and stumbles over her words.
When Shunsui Kyoraku, captain of squad 8 meets her, he finds her interesting, taking a liking to her immediately. After a few more 'chance' meetings, Shunsui suspects that she is hiding something, and is determined to find out just what she has been keeping from him.
Hana's worst fears are to loose those close to her, especially after a certain incident that happened in her childhood. But now she has to worry about the insistant voice in her head, whispering of bringing the destruction of the world as we know it. She can't sleep, for the voice creeps into her dreams, seducing her into madness. And the captain of squad 8 is not helping her predicament. She knows he's up to something, but can't quite figure out what.

Why is Hana so touchy about any questions about her zanpukuto? And what is it about her past that scares her so badly? And who the hell is this voice in her head?!