Hum, It explains the whispered couples but I don't see how it can explain Sousuke getting his memories of Kaname backsheetz wrote:
Now, I'm like most people here and am eagerly awaiting translations of BOMF, but I tend to agree with you. It would make sense and explain why Sousuke's memories of Kaname would start to fade when he is with Nami but return so vividly after she dies.
And it's not just Sousuke, but there's also Tessa X Bunny, and Leonard X Kaname. That just seems like too much of a coincidence.
It looks like he remembered the most important things in his life, that is Kaname and her features.