Houseki no Kuni

In a distant future, living gemstones defend themselves against lunar attackers who seek to carry their precious bodies away. Fragile Phos wants to join the fighting, but receives an apparently unheroic assignment instead: compiling an encyclopedia.

That task brings Phos to Cinnabar, whose poisonous power has led to an isolated night patrol. A promise to find Cinnabar a better role turns the search for information into a search for belonging. As Phos moves closer to battle and the mysteries surrounding the gems, change begins to carry a cost in memory as well as in the body.