Milk Shibori Hunter no Isekai Sakunyuuki: Nouka no Saenai Otoko ga Arayuru Shuzoku no Chiku B wo Moteasobi Toriko ni Suru

One day while taking a bath, Kakeru Endou, a farmer from Hokkaido, is suddenly transported to another world! In this new world, the breast milk of magical beasts is a powerful energy source used for all kinds of tools and weapons, sustaining the lives of the common folk. The warriors who gather the magical beast milk are called "Milk Hunters." However, there are few Milk Hunters, and the supply of milk is running dry in every country. To help alleviate this milk crisis, Kakeru has been summoned from his world as a Milk Hunter. Using the milking skills he learned on his farm with cows, he must arouse magical beasts to collect fresh milk and save the world! (Source: Kadokawa, translated)