lol don't worry @fuckriri1234 we all have those facepalm moments sometimes. XD
Anyway, "A work that has a character wearing nothing but an apron." Even that description alone is enough, with or without the sex part.
Upvoting this, but I would remove the "sexual activity" part. While "naked aprons" are inherently sexual, it should remain continuous with the "apron" tag
We should define "apron" absolutely: a work involving an apron (whether there's sex or not is irrelevant). Idk anyone who would goon to the thought of an apron in a non-sexual scenario but tags should be fairly defined.
In which case, works like [2] would be included.
Consider that clothed + unclothed = apron -> clothed = apron - unclothed. In other words, searching "apron" and blacklisting "naked apron" returns "clothed apron" like [1]
[1] #329864|Musuko ni Nando mo Kudokarete Konmake S…|52,224
[2] #659766|Ojou-sama Gakuen Shokuza-bu! ~Chouri Zi…|2,123describeapron+13