I wonder if the gost dreamed of something from Iori's past, instead of from his own past. Maybe because he is bound to him. Lisria
Thats an interesting take. He dreamt when he touched Iori while sleeping and Iori drowned as well. Who knows. At least it would be less predictable than the first option
Did Yukihisa is the boy his late father tried to save when Kurono was a child? Why did Yukihisa dreamed of him drowned?