Fallen is a slice of life story from the perspective of a fallen angel, whom was exiled from Heaven due to being betrayed by her jealous younger cousin. Once the ex-angel lands on Earth, she doesn't know what to do with himself. Now without a job, he wanders aimlessly trying to steer clear from potential threats. Eventually, a human girl comes across the angel and offers to help him. Although adamant at first, the angel accepted their help and the two became friends. Over time, the human helps the angel express his emotions and learn about human life, in exchange for knowledge of the life of angels of which Iertare can provide.

This story tells a tale of healing and growth as Iris shows Iertare around his town. Until eventually, new conflict arises to do with the cousin of Iertare, Minciuni, and a new angel, Elena.