Yokohama Chuukagai no Half-Elf

A half-elf merchant running a jack-of-all-trades shop in Yokohama Chinatown, Japan's largest and East Asia's biggest Chinatown. Unable to live as long as elves, he suffers from an intense lifespan complex and researches longevity potions effective for half-elves day and night. His end-of-life notebook is already complete.