The story your looking for is "Love, Lies and Lipstick" which has a sequel to it called "Executive Liason". both of those are by Maggiemay, who is on this site, as well as in a yahoo yugioh fanfic group called "Little Dragon"
http://groups.yahoo.com/group/little_Dragon/
its an age restricted group and you have to be a member to read the other fics ^^ I hope this helps!