Spirit of the Shrine: The Snake Swallowing Child

Years ago, Yul opened the door to the village shrine with the village children, which was taboo : the monster that came out of the door killed the village children and disappeared, and Yul was driven out of the village. Years later, Yul returned to the village and faced the monster again, and Jisoo, the village shaman's son, told Yul that only the person who opened the door to the shrine can close it again...