Ryukanshi Ace is a boy who discovers a mysterious egg that hatches into Tamazo, a ravenous monster companion. This fateful encounter thrusts him into the role of a Dragon Evangelist, tasked with upholding the fragile equilibrium between humans and monsters. His mission centers on harnessing "Drop," a primal energy force, and averting crises like the catastrophic Drop Impact, which imperils worldwide stability. Ace cultivates dynamic rivalries with figures such as Lance, a seasoned Dragon Evangelist, pushing him to hone his skills and secure his standing within the guild. His evolution from an unassuming youth to a dedicated guardian highlights themes of unity and tenacity, as he navigates the interplay between self-growth and the relentless demands of protecting coexistence. In collective endeavors, Ace operates within academic circles alongside peers, though documented accounts omit detailed chronicles of their collaborative ventures or individual metamorphoses within these alliances.