Oh wow, good to know, but reading novels with machine translation is kinda too much imo... It is really a shame that japanese/chinese/korean don't know/don't use english that much, would be such a prolific region. Also whole situation with porn in korea and china specifically doesn't help at all.. Afaik porn in korea while not exactly illegal, but requires you to confirm your age with actual documents if you want to consume it, so no one really bothers to make porn. That's why all manhwa has full censorship to not be considered as porn. And in china porn is straight up banned, i think? Japanese has it much better in that regard, there is loophole that if you have any censorship over genitalia it is not considered obscene or whatever, but that's why japanese porn even exists.I see someone above recommended the chyoa novells. So I can make some recommendations too.
I found a lot of good porn novels on pixiv.. in Chinese
In fact, there's just thousands of them. Who knows how many hiden gems you can find.
Anyone who's used to MTL should have no problem with that.
I can recommend some novels, of course NTR, Corruption etc.
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Some of them are wuxia / xianxia genre, so you can get confused about the style if you're reading for the first time.
Here are more authors with a whole collection of hentai, dirty, degenerate full corruption stories.
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These are just brief examples, here are the tags where you can find more on your own
NTR
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Corruption/Brainwashing
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Training
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Mother NTR
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Since it seems that japanese would never learn english themselves, i already started learning japanese, but its not going to be quick, i'll say i'll need at least couple of years till i can comfortably read anything.