Chapter 1 'introduction'

Y/N is Harleen Quinzel's childhood best friend, they lived right next to each other growing up and now share an apartment.
Just like Harleen she works at Arkham Asylum too.
It was a normal day for Y/N she was working abd always around her lunch break when would go out and bring food for her and Harleen. She enters the room and sees she is with the one and only
The Joker...

what will happen next to it?