Another Sister! (SHIZUO X READER)

Life in IIkibukuro went bonkers again..well its always bonkers so I shouldn't be saying that but lets get back to the matter at hand.One day Izaya's mother broke the news to him.She adopted a girl.So after a few days very unusual things started to happen.Who is she?Where did she come from?And WHERE IS THE SUSHI?!

I OWN NOTHING
Also THIS TAKES PLACE IN DURARARA
NOT DURARARA x2