It's not just the teahouse that can change time and space. With the chaos of parallel time and space, how should they and they choose in the face of changing memories?
If there is destined to be a catastrophe, I would rather have three lives than a three-person game, because odd numbers do not make pairs.
If you must grow through calamities, then there is still some room for hope, even if you are unintentional, it is better than the hopeless cycle that disappears into thin air.