idk when the original chapter came out, but these drawings are probably only a few weeks, if not days, old at most. Where did you get the 14 years from?
Same name, but it is not like he did a ton of 18+ manga, he did much more illustrations than manga oneshots. If we are talking about 18+ oneshots, I am only aware of the two ones published on Comic Koh, with only one of those translated to English.