I’m LOVING this fic and I’m not even halfway…
Ohhhh the slow burn, the narrative, the intelligence!
It’s very refreshing to read something not truly affected by fangirls behaviour and ridiculous conceptions of a Darcyesque or ooc Snape.
The fic in question is obviously in English and primarily an HG/SS with a secondary developing HP/DM

It’s called The problem of  purity.
It’s written from Phoenix.Writing.
You can find it on ff.net here.

Do be warned this story is 63 chapters long and 638k+ in lenght but is complete…Off to reading again I am…
Even when I really really need to get the hang of at least half of Freud material for next week…sigh😅