Tsukasa and her "sister" are really something. How dare Nasa not remember something AS HE WAS DYING! For shame. I know Tsukasa is some sort of timeless entity, but god-dang, is the loss of this one memory something that you will throw away an entire lifetime of happiness for? Even without him remembering it, you had a wonderful, fulfilling time with Nasa right? The content of this memory better be something extraordinary or I am going to impress my face onto my wooden desk.