This short web drama tells the story of the female protagonist 'Yoo Ji-hae', who is given a collagen mask pack that allows her to go back to the past, and realizes that a relationship from the past can change her life. This short web drama tells the story of the female protagonist 'Yoo Ji-hae', who is given a collagen mask pack that allows her to go back to the past, and realizes that a relationship from the past can change her life.