Once Upon A December~ A Ziall fanfic boyxboy

Niall Was the youngest of The royal Horan family, When a curse is set on him and his family, Killing his parents and brother, He and his Grandmother survive thanks to a raven haired young boy. What if Niall forgets who he is due to falling on a train his grandmother was on? His grandmother is still searching for him in hopes to find her dear grandson.

Zayn hearing about the great reward if The Young Prince Of Ireland is found, but what if when Zayn and Niall meet, Zayn makes Niall act like he is the royal prince...but what if along the lines they....fall inlove?

(OMG! THIS IS THE WORST DESCRIPTION EVER! I'M SORRY I DIDN'T KNOW HOW ELSE TO PUT IT!)