Sherlock long slash fics, not Johnlock request

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Hi all,
I'm looking for BBC Sherlock slash fics, preferably long, slow build ones, where Sherlock is in a relationship with another man, who is not either John or Lestrade. Basically, I'm looking for long slash fics that have Sherlock as one of the partners, but are not Johnlock or Sherstrade. The other person can be an OMC, a crossover character, a more minor character from Doyle canon, anyone. Just curious to see how such a relationship would be percieved by the other characters, particularly John.
Thanks!