The primary romantic storyline follows the accidental transformation of an angel into a human after she saves Shin Woo-hyun from a fatal fall. This event sets up a classic "two leads, one girl" dynamic that carries the emotional weight of Season 1.
A major tension point is Seul-bi’s struggle to learn what it means to be human while facing the reality that the soul she was originally meant to lead to the afterlife was actually Woo-hyun's.
Early in the season, Woo-hyun pretends Seul-bi is his girlfriend to ward off unwanted advances from another classmate, Jin-young.