
From what I have gathered from this series is that every character here has a "trigger" scene that needs to be set for them to be aware of things.
Correct me if I'm wrong but the mc guy started to being aware by either dying alot>being too self conscious about things/by being too "meddling" with stuff and cause the vhs tapes to activate after he died(????)
The ML dude got his self awareness after mc confessed to him, and also getting attention from the mc.
And the third dude's "trigger" to being aware is by seeing his crush's corpse.
I've reread the first few chapters and it seems that mostly the characters themselves died individually or by pairs cuz when the glasses dude died, the other 2 men were not present and did the cliche thing then ended up dying.
This is just what I have observed so far and sorry for my bad english, it is not my first language.

Also to clarify about the whole conscious/aware thing, its about how they are in the game or how they are experiencing some deja vu of some sorts like the third blue guy.
They are not just some program characters in my opinion but actual people who unfortunately just got stuck in some horror game mechanics because of you reread the series again from the start, you can actually see that most of their behaviours are realistic and on point to that of a human reaction towards someone dying like ex: denying reality.
(=・ω・=)