Ohitoyoshi Teihen Tamer ga SSS-Rank Seijuu-tachi to Mofumofu Musou suru

Tigo, a "monster tamer" who couldn't control a single creature, was the laughing stock of his profession. He worked diligently as an errand boy in an adventurer party formed by his childhood friends. However, during a dungeon expedition, an incident occurred. The legendary magical beast Fenrir appeared before the group, and Tigo was abandoned as bait. Just as he was about to give up all hope, he somehow succeeded in taming Fenrir! Tigo named the SSS-rank magical beast "Ginta," despite its surprisingly human-like qualities. And so began a carefree journey filled with encounters with various sacred beasts!

(Source: AlphaPolis, translated)