Sectumsempra!

Instead of putting up a shield, his mind uttered the spell he had wanted to try for a long time.“Sectumsempra!”Harry only noticed Malfoy’s eyes widening in confusion at the unknown spell before Malfoy went flying back with blood pouring out of his nose and pooling on his chest.In an instant, Harry was by Draco’s side.

I had this idea of subtle soulmate Drarry but befriending/dating each other after the Sectumsempra scene. Also, they both like each other but either they haven't figured this out or are afraid/shy to how their feelings to the other because of the reception. Don't know where I'll take it but I'm posting in the hope that it'll push me to complete it.Also, it's been a few months since my last rereading of the HP books, so apologies in advance for discrepancies.