Isekai de Saikyou no Ossan ga Musou suru Anthology

[MangaDex]

 

[Ezrah25]

Needs trash isekai tag

 

[Zero_Sen]

Needs trash isekai tag

Even when it's not isekai? So far, it's just been the equivalent of an old man who didn't bother learning to use "Quick Chant" equipment and another old man who defeated a VERY petty demon lord in the past.