I am into an adult niche from the last two years, trust me if you can find keywords in an adult niche with good searches. Just go for it.
You can make money with any niche. Just have to be good at it and make smart decisions.
I had 2 erotic story sites before, so maybe your domain you found are ex-mine
The thing is, I had quite good traffic, but they are a lonely man and lonely milfs who are not interested nor in dildos, nor fake vaginas. Ads are not paying much, I got max 200$ per month. Tried affiliates but it did not convert at all.
Can you share the link of your previous website ??