A boy, had a car accident , who lost his memory and his left eye, finds himself stranded in the world of BLOSMOSS after falling. The boy wakes up whimpering and trembling with fear, which triggers the growth of a tumor due to his anxiety. The tumor manifests into various obstacles within the war-torn realm, which are reflections of his nightmares-turned-monsters. Simultaneously, his left eye, the one he lost during the accident, inexplicably receives radio waves that transmit directly to his brain. This not only causes the boy to frequently experience hallucinations but also leads to the emergence of small red creatures from the empty socket of his left eye when he falls asleep.
Originally, the BLOSMOSS world was a peaceful space untouched by conflict. However, with the boy’s arrival and the increasing number of nightmares caused by his fleeing memories out of fear, the war-torn realm begins to expand, posing a growing threat to its inhabitants. Throughout his journey, the boy befriends companions such as Beetle and Tram, gradually uncovering the connection between his amnesia and the surrounding chaos. He realizes he must confront the core of the disaster head-on to help everyone avoid further harm from the war-torn realm. Only then can he uncover the truth behind his lost memories.