[Natsurin]

Originally Posted by ronelm2000

I personally think that all of them are canon. In fact, there isn't even proof that it IS the Real World that Riki woke up to and not a more concrete and continuous Dream World Riki and Rin created. >.> Oh Key ambiguity, what can we do without you.

There is though.

Spoiler for Drama CD and Refrain spoilers:

In the Drama CD "Bokura no Asa" Kyousuke affirms the fact that they are in the real world, and not a more stable world that Riki would have made.. And I believe that Drama CD is canon