Set in the year 9595, where the world is now a desolate, white, sandy dying wasteland, Lisa and Maggie find themselves at the end of time, unable to return home, where they find themselves to be possibly the last two humans alive. (Mirroring Noel Kreiss from Final Fantasy XIII-2)
Lisa has given up any hope of returning home, but Maggie tries to convince her that as long as they don't give up hope and think positive, they'll be able to get back.
This is the first time I've actually shown how Maggie carries her Maggie Blade around.
As for the three moons, it's a reference to Final Fantasy IX, where the world has two moons, one blue, which is the moon of Gaia and one red, which is the moon of Terra, which tried to assimilate Gaia five thousand years prior to the start of the game and failed, giving Gaia both. I added a white moon for Earth. So maybe Gaia tried to do to Earth what Terra did to Gaia?