Fanfiction.net - This website has a large variety of different fanfictions, not only to Orange, but to many other great anime series' as well! I took a look at a few of these fanfictions, and they are all great! Each fanfiction lets you know what it is rated, what language it is in, what type of fanfiction it is (ex: romantic, horror, comedy), and how many words there are in each writing piece. This website is very reliable and will give you a good taste. Just click the link to the left and you will be directed to the fanfiction for Orange. Enjoy your reading!
Asianfanfics.com - Another website that has a large variety of different fanfictions. This website is a little bit harder to find things you are looking for, but they do have some Orange works. If you are looking for great stories, here is a good place to go. Just be prepared to do a little bit of digging around! Who knows, maybe you'll find another set of fanfictions you'll love on the way. Enjoy your reading!
Archiveofourown.org - This website is a bit smaller when it comes to Orange fan fictions, but when you click the link it will directly bring you to the options. This website tells you when it was last updated, how many chapters, what genre the fanfiction will be, and a brief description of the fanfiction. Enjoy your reading!
Deviantart.com has a large variety of Orange fanart entries. As seen to the right, they are filled with talented artists that have a lot of love for not only Orange, but also the relationship between Kakeru and Naho. If you are looking for tons of goodies made by other fans, this is definitely a site I recommend viewing. Enjoy your look!