In the Heian period, a time when demons and monsters freely roamed the land, a young demon named Yamabuki has a singular goal: to defeat the strongest monk and claim the title of the top demon. His chosen target is Shinren, who serves at a temple deep in the mountains and whom the demon follows daily, looking for an opportunity to challenge him. However, Shinren proves to be no ordinary monk, and the dynamic between the aspiring demon and the seemingly unassuming temple servant forms the heart of the story. The manga is created by Migi Kigimine and originated from a serialization on pixiv that later saw print publication across two volumes. The narrative covers Yamabuki's persistent attempts to overcome his powerful rival, exploring their unusual relationship that began as a viral sensation on social media before being expanded and revised for its complete release, which concluded in 2025.