So my previous guess was right this time. Dee is the one behind class 3-4 wish. She had an accident during a class event and died. Her death triggered 17 students of the class made the strong wish that the accident never happened and they can stay together forever. That incident is the beginning of this endless-cycle world.
Ai is doing something different from all the previous people trying to escape from that world. None of them joined class 3-4. Ai does. And so Ai changed an important factor when the class is having a vote. In the original scenario, the vote were tie 9 vs. 9. Since Ai joins the class, she can vote, making it 9 vs. 10. I guess her choice changes the class’ event and possibly the event that will lead to Dee’s death.
Dee realized that she was the one who died before this world’s creation. That also explains why she doesn’t have a body when she’s in the “outside” world. As anyone would have guessed, she hah a crush on Alis and simply wants to stay in the same world with him forever. And that won’t happen if the current “endless-cycle” world is destroyed (they she would have really died).
Ai somehow still thinks there’s a way to “save” class 3-4, end this fake world but somehow “saving” Dee, too. Let’s see if this is possible or not.
