holy crap this was amazing
the "wake up" ending had me smiling with my mouth open. amazing game :O
(SPOILERS AHEAD)
after a bit of trial and error, i got the password working! i got the true ending on my first playthrough, so i couldnt go back to look for clues. i remembered the hint and physically went "WAIT YESSS" as i jumped back to my computer to try every variation i could think of. I got it after maybe 5 minutes fiddling. And let me just say- amazing atmosphere and gameplay and story and everything. The theory that i have is that Arumi (or something like that, i already forgot his name T_T) was in a coma, and the phone call was his parents calling out to him from the side of the hospital bed. This would make sense with the "fall asleep" and "wake up" terminology, as well as the part where he was hit by a car.
I had a family member who was in a coma for awhile, and they recall dreams kindof like this: where people were trying to guide them down the street to his hospital room. They recall fighting the people off, but eventually following them and waking up. Very powerful storytelling, in such a perfect experience.
though this was my first game of yours that ive played, ill definitely try to check out some more :)