Mikalela's Sister(YuichiroxOC)

What happens when Mika finds his long lost twin?What breed is she?Human,Vampire,or Seraph?Or maybe a mix of all three?What happens when she starts falling for her brother's best friend?What happens when her feelings are reproicated?Read to find out. P.S,I am a shipper(kinda) of MikaNoa,which will be in this fic,so if...