Frankly, the landscape for that specific niche is more fragmented than it should be. Archive of Our Own is my bedrock—the sheer volume and tagging system let you filter with surgical precision, but the quality varies wildly. You need patience to sift through tags like 'explicit', 'angst with a happy ending', or specific kink tags to find authors who treat the erotic elements as more than just mechanics.
I’ve had better luck following individual authors from AO3 to their personal blogs or Patreon. Many post polished, longer-form serials for subscribers that feel more cohesive than one-shots. Sites like Literotica have a dedicated M/M section, but the prose there often feels dated or clunky to me, like it’s stuck in a 2000s forum style. For professionally published stuff, checking the 'If you like this, you might like...' sections on retailers for authors like K.J. Charles or Alexis Hall can lead you to less mainstream platforms that host similar indie authors with spicier content.