A very surface level pre-in-and post game timeline!
Notes/my interpretation of the ending under cut :)
Pretty much for my interpretation of v3 i like to think that dr1 and 2 are canon, and like any other historical event, the tragedy got dozens of documentaries and similar shows based on the events! So pregame shuichi is essentially a hamilton fan. Of course, some of junkos fangirls and boys decided to make their own killing games! Their own fangans if you will. Obviously, kidnapping kids (especially ultimates) and putting them in a killing game is a huge big nono for so many legal and ethical reasons. So if you get kids who WILLINGLY sign up for a game that just simulates a killing game, then its totally fine, right? Well apparently because they got to season 53 before the participants broke out! Since team danganronpa couldnt ACTUALLY kill these kids (</3) they just simulated it, so with a few camera tricks, a shit ton of fake (pink) blood, and fuckery using the flashback lights, they just pretended the people were killed, while in reality they were -this- close to death before being pulled away quickly and rushed to a hospital!
So the end of the game goes pretty similarly, Tsumugi is spitting out tons of bullshit trying to pull this show she was trusted with back together and keep it entertaining, the trio escapes not knowing everyone's in the hospital. The three (i like including kiibo too, idk how to explain how he survived, ig they dragged him out when they ran and saved up to fix him) hide from team dr and just live their lived, getting jobs and sharing like a superrr crappy apartment. Idk how! But somehow! The survivors and the people in the hospital all reunite and they have a nice happily ever after<3
Side note: why would any of the cast think that pink blood was REAL blood? I personally think its REALLY funny if it's because the flashback lights led them to believe blood is and always has been pink, like can you imagine post game cast watching a horror movie like "????"