This sounds like it's going to be a good story, but there are a lot of spelling and grammar mistakes throughout the prologue. The line, "He was saving me, even back when we were kids..." is just a huge run-on sentence.
Also, at the end of that sentence, when you say Sakura was "...to stiff with terror" to use her magic, it should be "too stiff." Is there anyone who can edit your stories before you post them? Small mistakes like these can make sentences confusing, but they can be hard to see on your own.