Yukio x Rin

(Title will be changed when I think of a better one)

Blue Exorcist AU

What if...

Rin and Yukio aren't blood related brothers
Shiro is still alive
Yuri didn't die during birth
Rin knew he was the son of Satan beforehand
Yukio's a little bit older
Yukio and Rin are also dating.

Shiro Fujiomoto took Rin in after being sent by True Cross order (or at least I think it was them?) to execute both Yuri and Satan's child. Baby Rin smiled at Shiro, changing something inside of him. Despite what he had originally thought he couldn't bring himself to kill someone he had grew to care about and a new born child. Even if the two of them involved Satan.

Shiro hides Yuri and Rin from the Vatican inside his monastery.

Shiro already has an adopted son, Yukio.
Yukio and Rin grow up together in the monastery and become super close like brothers. But their feelings toward each other change as they grow older.

Things to keep in mind:

-I do not own blue exorcist, Kazue Kato does. If I owned it, it wouldn't be as good

-I own non of the characters unless I decide to add in my OC's

-Characters may act a little OOC, but hopefully not too OOC

-This is a yaoi. Maybe a little bit more on the shounen ai side, depending on what I come up with.

-GayGayGay

-Yukio= Dom/Top
Rin= Sub/bottom

-This is my first blue exorcist fan fiction, so don't be surprised if this isn't that good.

If any of this bothers you, then I wouldn't recommend reading