Average Joe is a story written by Kikuna Matata. It ran in Issue 43 at http://s2b2.livejournal.com/251808.html, and is mirrored at http://www.shousetsubangbang.com/mirror/average-joe/.
From fail-fandomanon.dreamwidth.org: "Joe is a normal guy who constantly finds himself the target of supervillain plans; inevitably, he's rescued by the mysterious Fist of Justice, and inevitably, they end up sportfucking. Tired of the weirdness, Joe finds himself in a support group for similar damsels in distress."
From delicious.com: "In a town filled with superheroes and their attendant fun clichés, a normal guy is just trying to go about a somewhat ordinary life."