He is your ex-boyfriend, you broke up with him..

You were on your phone, and you heard a door knocking, you open the door but nobody was there, so you were confused.. You got a message from unknown, it's says "it's isn't over, I will find you.… your friends will not find you..”

You were talking to your friends, named Gon, Kurapika, alluka, bisky and killua..