www.stem.org (слэш)

Steve Rogers and Tony Stark live in the Avengers Tower with the rest of the team but they may as well be living in different planets for all the things they can't seem to see eye to eye on. Steve has deep seated misconceptions about Tony, and really, Tony just thinks Steve is a dick. They may work well in the field together, but as far as their personal dealings with each other go, they don't know jack shit about one another.
STEM is an unexpected Internet phenomenon--it's Facebook, YouTube, Twitter, eBay, Goodreads, Skype and Amazon all rolled into one. And all the Avengers are in it with Steve being the most recent one to join. And Steve is just starting to really get into it, too especially after meeting heir2mecha.realm who is an amazing conversationalist--witty, smart, mysterious and remarkably thoughtful, and Steve can't help but trust him.
But is Steve ready to discover the man behind the mystery? Or will his misconceptions smother what feeble fire has been ignited between two people who have more to offer each other than what they're prepared to admit?