The Color of the End: Mission in the Apocalypse

ウスズミの果て

After an alien invasion wipes out humanity, the fumes the invaders leave behind carry a fatal disease that erupts as crystals from the body. Saya, a lab-grown 'Forever Child' who does not age, is tasked with cleansing the poisoned land and searching the desert ruins of fallen cities for any survivors of humankind. Her solitary patrols across the wasteland frame a quiet post-apocalyptic journey.