I realized a "strange" detail in episode 4, and actually it is also shown in the anime. As you are discussing some "episode 4"-related, things here, I will post it here (sorry! and also sorry if it is written elsewhere)
Spoiler for key?:
In Episode 4, when the gardening shed's shutter is closed, the key is given to Gohda by George.
However... is that key *really* the key of the shed?
In the game it is written that:
"The shutter was brought down and locked. Then George turned to the small window on the side of the storehouse"
"[...] Gohda-san, here, The key to the shutter"
"...Certainly, I'll take care of it. Gohda took the key, and after showing it to Kumasawa, placed it on its own pocket"
"There is only one key to the gardening shed's shutter. That was being held by those who were locked up inside it".
However, there is no red text to back up that claim. If we think on those terms, then the closed room of the storehouse can be defeated
