Well there can be boy/boy relationships too, depending on the development of the characters :p I mean, a boy has already kissed a boy in it, so who's to say it can't happen!Eh Idk, doesn't that depend on wheather Shade or Kylie chooses to be in one>?
Lol if she's gonna get involved with someone with a similar personality, Seto is a possibility
...that is if he doesn't scare her off first :P