Buzz-re Alice

A warrior known as Saint Alice, who used the ability to transform emotions into power to defeat a demon king, is wrongfully accused and exiled to a fortress-like labyrinth filled with powerful creatures. Inside, she discovers a mirror that links to another world, allowing objects but not people to pass through. Using this, she interacts with a young man in modern-day Japan who owns a restaurant. He sends her food and introduces her to contemporary entertainment. Inspired, she begins creating videos to share online as a way to repay him. When her content gains widespread attention, she unexpectedly gains immense power.