The Letter

Y/N is part of a very skilled assassin family, the Zoldyk family is their conpetition however they are not rivals. Buisiness comes first as always but the two family's are very good friends.
When Y/N is given a job to kill Killua Zoldyk her father makes her carry out the job.
She will need to be to her highest skills to do this, she has one chance to get it right. If she doesnt do it the consequences will be terrible from her family and the annomonys job giver.

(They are 15)

She fails to complete her mission and her and Killua Zoldyk run away with each other's from the assassins trying to kill them both.