A Milking Hunter's Otherworldly Milk-Harvesting Journal

Also known as: Milk-shibori Hunter no Isekai Sakunyuuki: Nouka no Saenai Otoko ga Arayuru Shuzoku no Chiku-B wo Moteasobi-toriko ni Suru, ミルク搾りハンターの異世界搾乳記～農家の冴えない男があらゆる種族の地区Bを弄び虜にする～

by Daichi Sorayomi

Kakeru Endo, a farmer from Hokkaido, is suddenly transported to another world while taking a bath!!! Here, magical beast milk is a powerful energy source used for everything from everyday tools to weapons. The warriors who collect it are known as "Milk Hunters," but their dwindling numbers have caused a severe milk shortage across the kingdoms. Summoned to save the world from its milk crisis, Kakeru becomes a Milk Hunter. (Source: Kadokawa)