Zack Hara, who escaped a tragic ending in the novel Oh! A mystery of "mono no aware" while trying to find an emotional life, works in Tokyo as a translator while struggling with his newly found chaos of emotions. He's drawn into the worlds of neo-punk bands, the phenomenon of jouhatsu (human "evaporation") and a scientist obsessed with answering the ultimate question of why we exist by researching flower pigments and yugen -- the mysterious beauty of the universe.