Finally, someone blaming me for something this good ;). Always there to be evil, anytime you should need it.
Ah, I love how eloquent Seishirou is in this fic, and how it never enters into his mind how Subaru is going to feel about his death. The fact that he, on some level, almost thinks this is for Subaru's own good (as he sees the Sumeragi's health decline) is also interesting.
I also love the last line... although, I think there's something slightly off with it. Something that breaks the flow. Reread it, and tell me if you can't see what I'm talking about.