looking for a story

[ROC_FAN]

hello everyone, I'm looking for a story(or book) I read time ago, the only thing I remember is that one of the two characters was the legal guardian of his younger sister ....
I know it's not much but I hope you can help me

thanks

[musicaholic]

This is the only story i can think of with the given discription
Control by Kim Pritekel & Alexa Hoffmanhttp
://www.academyofbards.org/fanfic/k/kp_ah_control1.html