Warrior's Rise follows 19-year-old Kaito and his journey to become the best in his field. In this world, naturally forming cave-like dungeons appear across the globe. The government has ranks on the naturally occurring dungeons ranging from F, D, C, B, A, S, and SS. After the discovery of dungeons in the world people exploring and clearing these dungeons labelled themselves as dungeoneers. Kaito tries to become the best brawler, one of many classes made by the dungeoneers.