Doo Na, a member of the girl group Dream Sweet, suddenly left the group one day and end up living in the same share house as Won Jun, a college student. Doo Na mistake him for being her sasaeng fan, and Won Jun does not know who she is. They become curious about each other. (Source: Korean = Netflix Korea) Adapted from the webtoon "The Girl Downstairs" (이두나!) by Min Song Ah (민송아).