[Akagirenya (Kinokoyun, Akagirenya)] Shuugakuryokou de Bokujou Taiken Shitara Masakano Isekai Shoukan⁉ ︎Ningen Bokujou de Namashibori! Kemonohito no Aka-chan Haran Jau [HexN Translation]

A school trip to a farm turns into an isekai nightmare when a group of human boys are summoned to another world as livestock on a beastman ranch, collared and lined up with milking cups suctioned to their chests as their nipples swell and start to flow. Orc overseers and a stable of hung breeders — a minotaur, a horseman, even a rooster — mount them raw, aphrodisiac-laced seed melting resistance into ahegao-faced begging while hard-shelled eggs plop from their gaping, well-used holes. One month later the herd is round-bellied and dripping, still hooked to the machines and moaning for more.