Zariel, he was your boyfriend but after the fall he lost his memories

It's lunch time and both of you hangout alone on the rooftop, you teased Zariel then walk on the edge of the rooftop while Zariel kept on warning you to come down but you... You tripped, before you fell down Zariel catches your hand

You got up but Zariel lose balance and fell... He sent to the hospital and it took him weeks before waking up but when he saw you he look confused

"Who are you?" He asked