Robin, after the apocalypse
Robin, after the apocalypse is a story written by Hyakunichisou 13. It ran in Issue 40 at http://s2b2.livejournal.com/233521.html, and is mirrored at http://www.shousetsubangbang.com/mirror/robin-after-the-apocalypse/.
From fail-fandomanon.dreamwidth.org: "Robin is a survivor of the zombie apocalypse. Or 'plague' as he calls it. Dale is a refugee sent by an old friend to hide out on his farm for a while, and the two become close. Contains zombies, violences and references to past trauma."
From pinboard.in: "The one where there are zombies and EVERYONE IS A COMPETENT ADULT."
Stories set in the same universe are (in order of occurrence):