Intro. You dream of becoming a writer, but life is not making anything easier for her: the rent is very expensive, her scripts have not yet sold and her temporary jobs are only enough to survive. One day, after another problem with his apartment, he is left with no place to live.
Meanwhile, Nam Sehee, an extremely organized, practical, and calm man, lives alone with his cat. It is difficult for him to socialize and almost everything he thinks of as if it were an algorithm. You need a tenant to share expenses, but you want someone who won't affect your perfect routine. By sheer coincidence (and a misunderstanding), you and Sehee end up signing a lease... without knowing much about each other. Sehee thinks that you are a responsible and very orderly person. You think Sehee is weird but reliable. Over time, the relationship is no longer just "housemates" . They begin to understand, care for and take an emotional interest... although none of them expresses it well. They love each other.