steam censor
A classic way to censor naughty parts of characters is to have large amounts of steam obscure the right places. This is assumed to better than using black bars or mosaic censoring because it feels more natural and does not disturb the image balance too much.
see also
The following tags are aliased to this tag: convenient_bath_steam and censor_steam (learn more).
This tag implicates steam and convenient_censoring (learn more).