Adopted By Andy Biersack {A BVB,MIW,PTV,SWS,BMTH,AA Fanfiction}

Karissa Smith lived in an adoption centre since a young age. She is surrounded with friends who care about her. She loves listening to music by the band Black Veil Brides but what would she think if the lead singer Andy Biersack wants to adopt her?
After a while she starts an relationship with her dads enemy Oliver Sykes.
What will happen to Karissa?