Touhou Gumonshiki ~ Memorizable Gensokyo  

In Gensokyo's human village, there is a clan that records residents' histories, regardless of their species. Every 120-180 years, a Child of Miare reincarnates with memories from previous lives but limited lifespans, usually not exceeding 30 years old. As the ninth incarnation, Hieda no Akyuu works on the ninth Gensokyo Chronicle. However, she ponders her existence's paradoxical nature - being both long and short at the same time.