孕兽师的异世界学园无双

The protagonist attends an academy for training adventurers, but he’s stuck with the underappreciated ability of a Tamer.
On top of that, his overwhelming libido makes him a pariah among women, leaving him frustrated and restless.

One day, after fellow adventures trick him into acting as bait and nearly dying, he stumbles upon a treasure meant exclusively for Tamers.
This treasure grants him a cheat-like ability to tame any living being—humans, elves, and more.