宝石の国 4 [Houseki No Kuni 4] by Saou Ichikawa

In this captivating installment, the story delves deeper into the world of the Lustrous, a group of sentient gemstones who protect their land from the mysterious Lunarians. As tensions rise, the protagonist, Phos, continues their quest for self-discovery and purpose amidst the chaos. New alliances are formed, and secrets about the past are unveiled, challenging the characters' beliefs and loyalties. The narrative intricately weaves themes of identity, transformation, and the relentless pursuit of truth, all set against a backdrop of stunningly imaginative landscapes and intense battles.