What Friends Are For
From Shousetsu Bang*Bang Wiki
What Friends Are For is a story written by Matao Torakka. It ran in Issue 57 at http://s2b2.livejournal.com/320195.html, and is mirrored at http://www.shousetsubangbang.com/mirror/what-friends-are-for/.
Summary
From fairyninjas.wordpress.com: "One friend helps another home, and then helps him in other ways."