Hot Springs Fairy Hakone-chan

Onsen Yōsei Hakone-chan (温泉幼精ハコネちゃん) is a Japanese comedy manga series by Daisuke Yui, serialized online in Aplix's Comic Meteor website. It has been collected in two tankōbon volumes. A short three-minute episode anime series by Asahi Production and Production Reed aired from October 4 to December 27, 2015. The series was simulcasted on Crunchyroll

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.