Houseki no Kuni: Episode List

1- "Fosufofiraito" ("Phosphophyllite")
(フォスフォフィライト)

Airdate: October 7, 2017

The Lustrous, a life form of humanoid embodiments of gemstones, fight against the Lunarians, who seek to harvest them for jewellery on the moon. The Lustrous' master, Kongō, assigns one of the weaker jewels, Phos, to assemble a natural history since they are unsuited for battle. Struggling to find new information to include in it, Phos is recommended to seek out the nightwatch, a Lustrous named Cinnabar, whose body carries a powerful poison. As Phos is looking for them, Cinnabar shows up to protect Phos from Lunarians despite wanting to avoid battle due to how their poison damages the land. The next day, Phos once again comes across Cinnabar, objecting to their wishes to be taken away to the moon and vowing to find them something they can do.