My Roommate is a Gumiho

Synopsis: A female college student accidentally swallows the marble of a male gumiho (a mythological nine-tailed fox), who is already hundreds of years old and close to achieving his goal of becoming human. If a human being swallows the marble, they can only live for one year, and the marble will break, preventing the gumiho from becoming human. Thus the gumiho suggests living together with the human girl.