Prompt: Harry's magic instinctively protects Darco

I have this idea after reading all this powerful Harry fics where in some of them he is able to do wandless instinctive magic.

So, imagine Harry's magic instinctively protects Draco from harm or danger, why everyone is confused and shocked since "aren't they supposed to hate each other?"

And Hermione making all those crazy theories trying to figure out the mystery before accept the most obvious one. I also like to think that Ron figures it out first but never says it out loud.

I was thinking in a more funny/oblivious kinda a thing, so possibly Hogwarts Era but it would work in any time.