Touhou Project Niji Sousaku Series - Ningentachi no Gensokyo

Each person has his own time on earth - some more and some less. And while the generations go on, the people in them change over and over again. However, the Hieda family has a different attitude, since the head of the house, Hieda no Akyu, though endowed with the gift of rebirth, is doomed to spend less and less time on earth with each incarnation. It's not uncommon for ordinary people that their memory, eyes, and perception are failing to work properly in their old age. But what to do if it happens to a person whose age does not lend itself to the words "old" or "young"? And if they are old