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.
While wishing to the shrine of the hot spring spirit that he would get closer to Haruna, Tohya drops a steamed bun into the water, and out pops a strange little girl.
Tour ambassador Hakone goes to Jigokudani, where Aki gives her a scare by saying there are still demons there.
Hakone and the gang visit Goura Parks, where they're attacked by the resident spirit.
It turns out that there are more hot spring spirits out there.
Hakone and Miya, accompanied by Haruna, Aki, and Tōya, are returning to Motohakone via the Tekkosen. Miya tries using her Water of Servitude to deal with the crowds, but that left her open for Gōra to snatch her secret puzzle box. Hakone goes after them to retrieve it, making Miya realize (through Tōya) that Hakone does not see her as an enemy, but as a friend. Miya is then urged to help Hakone. Miya is able to lunge at Gōra and take her puzzle box back. She then unleashes its powers, making Gōra grovel uncontrollably. As the ship returns to Motohakone, everyone races back to the shrine.
For a moment Hakone and Miya regained their full powers upon reaching the shrine. Hakone mentions that no hot spring spirit can warm the soul with stolen powers. Sensing wisdom in her words Gōra tells Ashinoko to stop. Ashinoko turns on Gōra as a result, but that is because Ashinoko, being still too young, cannot fully handle her powers yet. Hakone and Miya return to their weakened states because of using too much power, but Hakone manages to neutralize the enraged Ashinoko, causing her to disappear. They fail to find her, but managed to return to her well a few seasons later. Gōra and Ashinoko started working around Haruna's family-owned resort, and things return to normal.