World-building in this song is so vast I can't believe it's contained in 4 minutes and 10 seconds. Sasakure tweeted that Miku's speaking part is the hardest part to tune and for me it shows, Miku's spoken word in this song is far above talkloid quality, it's comparable to finely tuned Voiceroid. And writing 言の葉 as 言の刃 is just, finesse.