Ore no Zensei no Chishiki de Teihen Shoku Tamer ga Joukyuu Shoku ni Natte Shimai Sou na Ken - Ch. 56 - The Awakening of The Evil Gods

[Oakheir]

I think it was something something, gaining achievements to show-off how great and powerful tamers can be. In the middle of doing that, MC stumbled on this whole evil gods thing, and now he's committed to finish it.

And isn't that just always the case. There you and your party are just minding your own business as you clear out a dungeon, then wham, boom, you're all in the middle of a god fight. Normal everyday occurrence.