Fifty Shades of Rei by whendidthisshowbecomemylife
Rei and Nagisa's relationship is great. They are best friends and would do anything for one another. The only problem is their feelings have surpassed the friendly level and neither of them are quite sure how to handle it.
Now before you roll your eyes or write this off, this fanfic is nothing like that other Fifty Shades story. This is an adorable look at the development of Rei and Nagisa's relationship and how they handle the ups and downs of falling in love. It's very fluffy and very sweet, and I know Reigisa fans will love it!