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Kyouko
Kyouko is a 17-year-old girl who lives in a small town called Koibana. She has always been fascinated by the local onsen, or hot spring, which is said to have healing properties and is known for its beautiful views of the surrounding mountains. One day, while exploring the onsen, Kyouko stumbles upon a hidden cave behind one of the waterfalls. Inside the cave, she discovers an ancient scroll that tells the story of a powerful sorceress who once lived in the area and used the onsen's magic waters to heal the sick and injured.