Jiburiru: Second Coming

Rika Manabe is just your average high school girl until she gets attacked out of nowhere by a demon named Asmo and finds herself transformed into St. Djibril — a warrior angel tasked with fighting back against demonic forces — all because a wounded angel named Luvriel decided that was the best solution. Her boyfriend Naoto is caught up in all of it, and their relationship gets complicated fast when his stepsister Hikaru shows up from abroad and starts attending their school. Then there's the demon Rococo hunting down another girl named Meimi in an empty park, trying to strip away her powers entirely. The world is messier than it looks, and the line between protection and possession gets blurry. This is a 4-episode OVA from 2007 by Studio Soul, adapted from a visual novel, and it sits squarely in the magical girl meets hentai space — think transformation sequences and angel-versus-demon power struggles, but with explicit content woven throughout. Don't go in expecting something family-friendly; the erotic elements are central, not incidental. If you've watched Angel Blade or Bible Black and wanted something with a slightly more structured supernatural plot layered underneath, this scratches a similar itch. Fans of Discipline: The Record of a Crusade who appreciate some actual story framing around their adult content will probably find the angel-demon conflict here engaging enough to follow through all four episodes.