Rogelio, who lives on the Painting Island, has the spirituality to communicate with animals and an amazing talent for imitation. Since he has no father or mother, he has been dependent on his grandfather's house, Huaman, since he was a child. Rogelio, who was suffering from cancer, met his friend Yuri Thorne in the forest. On the night when he invited him to be a guest, Sasim, the time demon lord, suddenly arrived. In order to protect Roger, Rogelio chose to take Sasim away from the real world, leaving only a clue of "the end of the sky". With the hope of saving his grandfather, Rogelio left the Painting Island and set foot on the continent of Vestia. And during the journey, he successfully passed the hunter exam, continued to grow, and came into contact with the practice world of the ancestors and Qi, which triggered the subsequent adventure stories.