After experiencing utter terror in their first battle against the Lunarians, Phos’ guilt over almost losing the Amethyst twins drives them to stay awake during winter, when all the other gems are asleep. For company, there is only Sensei, and Antarcticite. Spending time with the cold and distant Antar, Phos begins to change further, especially …

Phos, a member of a community of creatures made from gemstones, feels useless and incomplete, unable to contribute anything to their comrades due to their utter lack of competence. Under threat from mysterious creatures from the moon, the gemstones defend themselves from being smashed into pieces and “collected” by these beings. After a chance encounter …