Love Me Like You Do (Diedrich x reader)

In this Story there will be very minimal cannon references seeing as how I am not up to date with the manga. Excuse the cheesy stolen title I just have that song stuck in my head. This will be based off a borrowed (cough *stolen* cough cough) idea I had read on a tumblur page my sister had me read. I thought hey I don't see a lot of reader inserts with the young Baron and seeing as how he isn't so easy on the eyes as a older gentlemen I concluded that was why. So in this story Vincent and Rachel phantomhive have started their little family and reader lives with them as Francis and Vincent's little sister. Vincent wishes nothing more than his dear little sister to be happy with a family of her own but due to her 'eccentric' personality for a woman of her time (she is a lot like Nina Hopkins) she has trouble attracting suitors. So Vincent decides he will arrange a marriage with a trusted old friend of his. How will Diedrich feel being trusted with The Earls sister and how will she feel being given away to a man she has never spoken to? will they learn to get along or will Vincent's matchmaking experiment fail?