The Girl Downstairs

 is a romance webtoon created by Songah Min; it was updated every Wednesday. The original webtoon is in Korean.

Synopsis
''When Joon moves into a new apartment for his first day in college, he was not expecting an ex celebrity, Duna, to be living downstairs, hiding from her past life. Joon finds Duna strange and avoids her at first, but soon finds himself in her room without realizing what he is getting himself into. The Girl Downstairs is a new college romance story from the creator of hit series, Nano List.''

Related

 * Nano List - Same Creator