Gordian Knot is a story written by bupparo. It ran in Issue 28 at http://s2b2.livejournal.com/162538.html, and is mirrored at http://www.shousetsubangbang.com/mirror/gordian-knot/.
From the author: "I went over to help Alex pick out his suit. Alex + Me = SEXSEXSEX. The suit made it out okay, but the tie got destroyed in the crossfire. Good thing too, because he can't tie one to save his life."