The manga, named after its author Ichikawa Haruko and published in Afternoon, serves as the basis for this plot. Taking place in a far-off future, a fresh entity named Houseki emerges. However, the Tsukijin threaten them, hoping to convert them into decorative pieces. To counter these foes, the 28 Houseki must take up different positions, ranging from fighters to medics. Phos yearns to defeat the moon habitants, yet her gemstone lacks an assigned task. Eventually, Kongo, the manager of the gems, tasks her with overseeing a natural history magazine. This summary stems from a promotional video that marked the manga's initial volume publication and was subsequently distributed via YouTube.