Words Worth Gaiden (2002 Anime Series)

In the world of Words Worth Gaiden, two tribes coexist in a delicate balance of power and mystery. The Tribes of Light inhabit the world's surface, wielding the art of sword-fighting with skill and precision. Meanwhile, the Shadow tribe dwells in an underground city, where they possess a unique affinity for the blade and a strange, accelerated aging process. Against this backdrop of ancient traditions and hidden secrets, a young protagonist emerges, driven by a thirst for knowledge and a desire to bridge the divide between these two disparate worlds.