I get the feeling they may have already gone insane and what we have been witnessing is their delusions, hence that weird rant that the phone got. I can't wait til this is animated!
The Otherside fucks with brain areas that govern speech and symbol recognition. That's why they can't read stuff when they transition from our world to the Otherside. And that's why it's as if people in Otherside speak gibberish when perceived by people in the real world and vice versa.
Oh jesus that's even scarier than I thought.
Glad to see them comforting each other (sweet), but damn that ending. Send shivers down my spine.
I love this so much. Can't wait for the anime!