(Updated) so my theory is that in the end of SEE THAT? era, we saw that their old ship broke (from the Story Film X: Two girls who keep memories video) because of the person who confessed in the beginning of this video who might be Kyujin because of one scene where Sullyoon whispers to her saying “This time, don’t fail”. Additionally, in Story Film X, we see Kyujin crying while Sullyoon looks down on her, she was disappointed. They are the only two who knows why the mission failed. The others lost their memory, probably from the crash. You might be thinking: “Why is Sullyoon disappointed AT Kyujin specifically?” That’s because in the Rules of Play NMIXX ADVENTURE video from Dice Era, we see Kyujin’s role as “Engineer” meaning she’s the one who designed the first ship. They ended up going back to their normal lives, which is seen by multiple scenes like Haewon and Sullyoon at a party. But now Kyujin has been working hard to create a blueprint for their new ship “MMU” with the same fuel: Impetus, she feels pressured to make it work since Sullyoon doesn’t trust her. This film probably takes place during Fe3O4: STICK OUT era since we see the name MMU already in the OUT SIMULATION film. In Jiwoo’s scene, we see her somewhere barren, she finds a box. This COULD be a reference to the box in “MIXX, you imagine” video. Mixx is a place that existed in the minds of the girls, fed by their imagination but somehow that place became a physical object they could see in FIELD (the real world) in a form of a box. As soon as it was opened, MIXX existed. So when Jiwoo opens it in this film, MIXX existed once again, giving them a second chance in reaching MIXXTOPIA. This era is all about the departure of MMU. They are planning to go back and continue the adventure that they couldn’t finish. Which is seen at the end of the video when they all come together at what looks to be the same place in Jiwoo’s scene and see black smoke above them (?). Then they all look in the same direction and at the very last scene of Jiwoo smiling, we hear a horn. Their second journey is beginning. This is what I got based off the video and I’ll update if I notice something else, please correct me if anything is wrong!