Some years later, Yobi's soul is released. Yobi becomes human and Geum-ee is probably a grow-up already. It is shown that Geum-ee's soul is blue, meaning that he loves Yobi. she may not understand love and friendship.
After losing her family to fox hunters, five-tailed Yobi lives in the forest with some shipwrecked aliens, far away from the humans. When one of her alien friends gets captured by a villager, Yobi has no choice but to adventure into the human world to rescue him.—trakt.tv
One night many, many years ago, long before anyone lived nearby, a very strange thing happened -- a flying saucer crash-landed into a hilltop, which happened to be the home of a curious young gumiho, or fox spirit. Today, even as the city crawls up the side of the mountain, they're still there. And when Kang Han-Moo brings his class of misfits to a retreat up in the hilltop woods, the aliens from the saucer can't resist giving them a scare, while the mischievous, shape-shifting kumiho, Yobi, can't resist investigating the kids. In fact, she finds herself falling in love with one boy in particular, Geum-ee Yobi's masquerade is a barrel of fun, until a fierce and implacable hunter crashes into everyone's lives. Things are about to get even stranger in Yobi's world. And when the truth about her fate becomes clear to Yobi, maybe heartbreaking as well.—https://asianwiki.com/Yobi,_the_Five_Tailed_Fox
One hundred years ago, aliens landed on a mountain near where a small, white five tailed fox lived. After being stranded on Earth for one hundred years, they are ready for a test flight to see if they can return home. The test fails as one of the aliens makes a mistake, and the other aliens tell him to leave.
The runaway alien finds itself taken in by a class of students at the foot of the mountain. There, a teacher named Kang trains students who do not fit in at a regular school. In order to save the alien, the five tailed fox takes on the form of a human girl, and joins the school under the name of Yobi.
Staying at the school, Yobi becomes friends with one of the students, a boy named Geum-ee. She grows more and more attached to humans and enjoys her time with them, until a fox hunter appears, as well as a shadow detective named Mr. Shadow who gives Yobi a device which will allow her to become human by taking the soul from a human.
Yobi becomes exposed to the hunter, which makes her leave. With the fox hunter set upon hunting her down, Geum-ee tries to save her, but falls down in a lake which makes Geum-ee's soul trapped in a cage as a bird. Yobi tries to save him, but Mr. Shadow takes Geum-ee's soul. He states that his soul was taken from him long ago and that he needs one to become solid. Yobi defeats the shadow, grabbing the soul from his core whilst getting attacked in the soul lake.
Since they fell into the soul lake, Geum-ee crosses the dimension only to be told by the soul lake's gatekeepers that the number of souls in the lake must remain the same, and a soul can never go out unless another soul replaces it. Yobi then allows for Geum-ee's departure back to the human world by placing her own soul in the bird cage. Once he comes back to consciousness, Geum-ee tries to call for Yobi, but to no avail. He is last seen leaving with the teacher and the other students.
Some time later, Yobi's soul is released. Yobi becomes human and is most likely reincarnated to become human not too long after her soul had been exchanged. It is unknown if Yobi and Geum-ee see each other again or not.
