-Time is the middle of the Heian period. The story begins with an ominous prophecy sung by Seimei Abe, the onmyoji of the demon city of Heiankyo. "Oeyama, the headquarter of demons where hundreds of demons gather. According to Seimei, the gate of" Onijima "will soon open, and the seal of Oeyama will be lifted. At that time, the demons and sake that eat up Kyoto It is said that Tendouji will wake up. At the behest of Michicho Fujiwara, Tachibana Yukifusa runs to the mountain of Oe. What is the purpose of the woman who has come into contact with Gyobo? Can Gyobo stop the seal of Shuten-doji from being unsealed? And the mysterious word "Oejima" left by Seimei. What? A new legend of demon extermination is about to begin in the swirling capital of Kyoto !! "

Aomi Karado loves living in Japan. During his senior year in college, he goes on a trip to mainland Asia with his friends. Unfortunately, because he was caught in some illegal activity with the locals during his trip, his job offer got canceled. While looking for another job opportunity, he is introduced to a career by a diplomat. The job description calls for him to to work at the emissary in the Kingdom of Laos. Karado will have to deal with his fear of foreign countries to grab this opportunity.