Metaphysical / Paranormal event
For many years, the earth has been hidden under the guise of the solar system being uninhabitable for life, the God of Destruction plans to wipe out the system, Ku warns Gretal in hopes she'll abandon the planet but her stubbornness forbids her to do so, that and her disbelief of a God of Destruction, she purposely did not tell Stella of it but Crystal has been .
Since then the system is known to be cursed and to be left alone.