THE GIRL DOWNSTAIRS

When Won-Jun moves into a new apartment for his first day in college, he was not expecting an ex celebrity, Du-Na, to be living downstairs, hiding from her past life. Won-Jun finds Du-Na strange and avoids her at first, but soon finds himself in her room without realizing what he is getting himself into. (Source: WEBTOON, edited) — Description from AniList community (anilist.co).