A narrative turned on its head, an isekai gone wrong. Not the first, but perhaps the first to deny the reality of the isekai altogether as a construct, a fictional item wherein the narrator can play.

The diegetic focus on sounds meant that music only played when stated--it could have been enhanced to have some nature noises and other items instead to fill in the gaps to continue the conceit of "the only sounds played for the audience is actual sounds the protagonist hears".

A brief terse short work that I think only really fumbled by filling up space with beastman lore, when the protagonist would tune that out altogether. With a little tinkering for the focus, the strengths of this piece would shine even more so.