https://www.melonbooks.co.jp/detail/detail.php?product_id=2263892
https://ec.toranoana.jp/tora_r/ec/item/040031125481/
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_338792/
https://www.dlsite.com/maniax/work/=/product_id/RJ01146797.html

Base +22

Yui is tricked by aliens and agrees to become a cowgirl (her friends are suffering from "the shamelessness sickness" -the aliens fault of course-, and the aliens will cure them if only Yui helps out a little...). Seems like the aliens overused their own race's naturally masochistic cowgirls, but luckily Yui is just the perfect candidate to propagate their race! With a little bit of genetic modification, a few body mods here and there, and voila; The perfect breeding cow with pheromones that makes a man unable to resist fucking her! Even her friends can't help but see her as livestock and join in on the fun. Also her milk seems to be a huge hit!

A very nice hard-core book from the author! And it seems like the next one will be a continuation to this.

Base +24, Nightwatchik +6, Crash and Burn +6, Kalevala +35, nguyenbaodyy +9, Prof. Tree +9