Something like this happened me last winter lol
I kinda wonder if that's a in house heater or a outside unit for ventilation that by chance also generates heat.
This kinda makes me want to see a story of someone grabbing some scum or shithead and roll them around so all their body and face is striped but don't kill the mand instead see what happens to a yukkuri in the wild that is all stripped.
Basically a weird abyusey experiment to see if such cosmetic change do trigger the "uneasy looking yukkuri" reaction or something else.
Idk why but this gave me an idea of tie a yu in a car radiator lolWould put some good bafflers so I could listen to its suffering rofl