WARNING: MANGA SPOILERS. TAKES PLACE AFTER MANGA ENDING....
Sanemi Shinazugawa X Tomioka Giyuu
I strongly believe that no other ship is more superior than sanegiyuu in the entire demon slayer universe. I love how their story is portrayed in these fanfictions. It's bittersweet, and so, so, so beautiful. I love to see how they slowly learned to become vulnerable again, and to rely on each other. Their soft smiles is what gets me... both are so kind and in this era where peace reigns they are finally able to smile and be happy.