Gumiho Yeon, who despises humans, accidentally avoids an accident with the help of human Dong-i. In essence, a nine-tailed fox is a being that has to repay the favor it receives. Yeon visits Dong-i without skipping a day for Bo-eun, and Dong-i is only burdened with such a kite. The two, who seemed never to be able to get closer, know each other's wounds and shortcomings, fill them in, and develop good feelings... The two are different in their environment, race, and way of loving. Can a nine-tailed fox and human love have a happy ending?