Chained Together (Laxus x Natsu)

What happens if a little mishap of magic infused neko ears and tail get onto Natsu, as result of Happy's pay back. Natsu could have removed them at anytime, however, the only catch is. If someone's magic becomes infused with the items, only that user can remove them. So what happens if by accident Laxus's powers mixes into the objects? But not only that the victim has to stay within a 5ft radius of the caster.