Most of my favorites are on AO3. The advanced search lets you combine the pairing with 'Crossover' and then filter by kudos or word count. I filter out anything under 10k words—lets the story breathe. Found a stunning noir-style crossover with 'Sherlock' there, where they're both detectives. The writing was so in-character it felt lifted from a lost Rowling manuscript.
Avoid Wattpad for this pairing. The tags are a mess, and the tone skews too young. The real depth is elsewhere. A couple of gems exist on dedicated 'Harry Potter' fanfic archives, but AO3's curation tools are unmatched for finding what you actually want.
Honestly? I think the obsession with 'best platforms' is a bit misleading. The truly standout S.S. stuff I've read has been scattered—a phenomenal piece on AO3, then a raw, unfinished WIP on a forgotten LiveJournal, a sharp one-shot shared directly on a Discord server. The platform doesn't host the 'best'; it hosts the most. AO3 has volume and a great filter system. FanFiction.net has the dusty classics from the mid-2000s, a very different vibe.
My method is less about the site and more about chasing specific authors. If I love someone's take on the dynamic, I'll dig through their profiles across multiple platforms. Sometimes their best work is buried on a personal site they've abandoned. It's a hunt, but that's part of the fun for me.
Wow, this takes me back to my peak Marauders-era Tumblr days. The real treasure trove for S.S. crossovers isn't usually on the massive, algorithm-driven sites. I've had the most luck on specific fandom archives that sort by 'ship' and 'era'. 'Archive of Our Own' is the obvious start—the tagging system is a lifesaver. Search for 'Sirius Black/Severus Snape' AND 'Alternate Universe - Canon Divergence' and you'll drown in options.
But don't sleep on older, niche archives like 'Snape-Potter' or sites dedicated to 'The Snape/Black Exchange'. The quality there can be astonishingly high, often written by veterans who understand the post-'Deathly Hallows' character nuances better than most. The prose tends to be sharper, less reliant on modern fanfic tropes. I found a brilliant wartime espionage AU on one of those that redefined the pairing for me.
2026-07-18 00:35:01
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I REALLY DO NOT HAVE TO WARN YOU DO I?Desire doesn't ask. It corrupts.
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Taboo. Risky. Obsessive. Guilt only makes the connection deeper. The constant fear of getting caught only makes the thrill hotter. Boundaries shatter as control is completely surrendered in gyms, living rooms, and hidden corners.
No mercy. No escape. Just a raw, addictive temptation that leaves you completely undone and desperate for more.
Forbidden Flesh — where wrong feels too fucking good.
WARNING ⚠️ This series are meant for 18+ and above.
It contains Deliciously dark erotic tales of total surrender.
“where Forbidden desires have no limits—priests fall, stepbrothers claim, women claimed and professors own. Thirty-five filthy and erotic stories. Zero mercy.”
Embark on a journey of seduction and passion with these collections of fan stories that will leave you breathless and begging for more. From forbidden romances to dangerous liaisons, each tale explores the depths of desire and the power of lust.
Power. Obsession. Pleasure. Pain.
Behind every Alpha lies a dangerous hunger—and these men don’t ask for permission. They take what they want.
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These aren’t sweet love stories.
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Some loves save you.
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Enter at your own risk.
WARNING: mature content ahead. If you are below 18years, please abstain from reading this story. If you find the content unsuitaitable for you, don't continue reading.
DARK DESIRES: Forbidden romance stories is a collection of short steamy stories. Let's explore those toe-curling sensations together. Forbidden things tend to be more fun, right? if you agree with me, join me in this journey.
NB: This work is not a sole creation but a partnership between two authors.
Author Winnie Wamae and Redbutterfly