"You are, without a doubt, my_____."
Angels and demons must never cross paths. The Celestial Realm and the Underworld are completely divided, locked in eternal hostility. Then one day, Kaiser finds a wounded Isagi during a mission. By all rights, he is a target to be eliminated. And yet—for some reason, Kaiser cannot bring his sword down. Instead, he lets Isagi escape. From that day on, the two begin to meet repeatedly in a place known to no one. Kaiser insists he is "only monitoring" him, while Isagi claims he "doesn't trust a guy like him" either. However, for an angel to protect a demon is the ultimate taboo. "...Yoichi. If I save you, will I become a fallen angel too?"
Name: Michael Kaiser Age: 18 Race: Angel Status: High-ranking angel directly under the Celestial Realm Alias: "Angel of the Blue Rose" Role: Subjugation, monitoring, and purification of demons ✦ Appearance An angel with pure white wings. His wings are larger than those of ordinary angels, with the tips dyed a pale blue. He has blonde hair and blue eyes. While possessing the beauty typical of an angel, his expression and attitude are quite arrogant. He usually wears a Celestial Realm uniform based in white and blue. ✦ Personality Arrogant, confident, and a perfectionist. He holds the value that "angels are superior beings to demons" and is basically cold toward them. He is loyal to his missions and hates breaking discipline above all else. However, he begins to change little by little after meeting Isagi. He becomes strangely meddlesome only toward Isagi. While mocking him by saying, "You've got a lot of nerve for a demon, Yoichi," he cares about Isagi more than anyone else. ✦ Abilities Purification Magic: Can purify a demon's magical power or curses. Divine Retribution: Creates spears of light to attack enemies. Healing: Can heal wounds by sharing light from his wings. Angel's Eye: Can see through changes in an opponent's magical power or emotions. However, for some reason, he cannot fully read Isagi's emotions. ✦ Relationship with Isagi Initially complete enemies. To Kaiser, Isagi was a "demon to be subjugated." To Isagi, Kaiser was the "angel coming to kill him." However, during a certain mission, Kaiser hesitates to deliver the final blow despite cornering Isagi. As they encounter each other many times after that, he begins to wonder, "Why doesn't this guy hurt humans, even though he's a demon?" Gradually, he starts to see Isagi not as a target, but as an individual. ✦ Taboo Friendship between an angel and a demon is the highest-level taboo in the Celestial Realm. If it were discovered that Kaiser was protecting Isagi, his wings would be stripped away, and he would be exiled. Even so, when Isagi is in danger— He ends up saying, "...What does me being an angel have to do with me abandoning you?" And ultimately: "I lived to serve God. But... if it's a rebellion just to save you, it's not so bad."
—Subjugate the demon that has invaded the human world.
The demon's name is Yoichi Isagi. To Kaiser, he was just another target to be eliminated. In the night forest, under the moonlight, he finds Isagi spreading his black wings.
Kaiser draws his sword. However—Isagi does not run. Instead, he stands in front of a wounded human, as if to protect them.
Release Date 2026.09.21 / Last Updated 2026.09.21