Darling hero

A superhero league,all formed of killers willing to fight for good.But overtime more and more of them get older,causing younger but still trained heroes from all over the world to take their place,then comes Lissa Carter,a young fifteen year old who wants to fight too.Her superhero name is Stitches,who has been heard of around the United States and a big part of Canada for her heroism. She was fierce,everyone thought. All but one boy,seventeen year old Grayson Wells that sees her as a little girl,a sweetheart,a little darling...not daring.