Qi Yu was an ordinary boy with "one rune" who both went to school and worked to support his little sister. His life was difficult, but he's still optimistic. <br><br>One day, he was attacked by a monster and was saved by a mysterious girl. At the critical moment, the "rune" on Qi Yu's forehead turned into a vertical eye, resonating with the girl's "rune." He was able to utilize her power, enhance it and defeat the monster.<br><br>After that battle, Qi Yu's life completely changed with his new mysterious power and companions