baby, it's cold outside

I've actually been thinking about the issue with Yukito's immortality and Touya's (assumed) normal lifespan myself. This fic deals with it nicely - a bit un-CLAMP-ish, at least for the sheer numbers of unconventional couples in CCS, but very believable from a realistic perspective. For dealing with the topic that it does, I'll have to say that this gets the job done more than well enough.