This is so adorable. I'm not usually a fan of Ryan/William fics, but this is just too cute. Although my mind keeps going toward a kind of Pedobear thing, although I'm sure that's not where you're going with this, haha. It's so good, I love it! I can't wait to read more. :P
[[SPOILER]] I hate spoiling stuff, but I'm thinking you need a warning. You're right with the Pedobear thing. I write about morally unacceptable ideas and then add loads of blood, gore and a really sickly cute friendship into the mix.