Character from the novel "Kemoshota Adventurer Party vs. Erotic Trap Dungeon Part I (Warrior and Wizard)" from Nemuneu that can be read there:
https://www.pixiv.net/novel/show.php?id=16701551
Skoo is a newbie magician from a party of other 4 cubs that entered in a wrong dungeon, the "Erotic Trap Dungeon", the first novel chronicles the misadventures of both Tap the Warrior and Skoo and how they try to challenge a number of levels. The 6th level for Skoo he finds a ranch run by bull demons, he is discovered, fitted with a cursed nose pierce that makes him docile, stripped down and forced to be milked until he faints and is teleported for the next level.

Manmosu Marimo liked that chapter so much that he did a fanart, the censored twitter one is here:
https://twitter.com/marim189981/status/1552390228446326785

The author then did a second novel (Revenge of the Wizard Skoo) that can be read here:
https://www.pixiv.net/novel/show.php?id=18115695

The boy cant take out of his mind his "experience" at the 6th level, without telling his friend he goes again in the "Erotic Trap Dungeon" so he can have his revenge, there the same bull demon who milked him make a deal with the fox boy, if he is willing to be cursed again with the nose piercing and win his "game", the bull will admit his defeat, but else...

Marimo again did another fanart, this time of the second novel.

Twitter and Pixiv page from Nemuneu:
https://twitter.com/nemuneu
https://www.pixiv.net/en/users/982931