Monsters live for a long time, but they lose some memories little by little over time. You won't even know what you are missing.
Ye Qing has been able to see monsters since he was a child, and he also has many strange dreams. After meeting Kuro, he realizes that those dreams are actually the lost memories of the monsters. So he chose to return his memory to the monsters.
I thought for a long time about sadness and lightness, about what I wanted to write. But I still couldn't think of a word to express those, so I simply quoted a sentence written by Murakami to Norway.
A 100% love novel.