Onsen Yousei Hakone-chan

Japanese Title: 温泉幼精ハコネちゃん

English Title: Hot Springs Fairy Hakone-Chan

Plot
After many years of dormant rest, a hot springs fairy awakens in modern-day Japan. However, while she slept, she took on the appearance of a young girl. She decides to cooperate with the locals whilst trying to regain her powers.