Find the blue butterfly.... The lead character Hirano Kazuya meets a beautiful girl at a belvedere. In the big city Tokyo, his journey to find the "True World" has just begun.
They were told to not fear death to protect the mountain. But the mountain won't die for them. What they saw beyond the path where humans disappeared was---
In the future after humanity has declined, a human child becomes the subject of a certain beastman's research... A serious 32 page standalone manga story featuring their meeting and parting.