A Late-Start Tamer's Laid-Back Life (Manga): Volume 6 — Yuu Tanaka

When powerful monsters shrouded in a strange black mist start spawning around the Village of Alf, Yuto decides to investigate. Along the way, he dives deeper into the village's lore, which includes guardian beasts, sacred trees, and a sealed archdemon threatening to make a comeback. It's up to Yuto, his monsters, and their many new acquaintances to save the village!