'To X who doesn't love me' is a story of young people in their 20s who are struggling with their dreams and love, heralding the birth of a reality-sympathetic drama. 'To X Who Doesn't Love Me' is a "expiry date" romance drama that tells the story of Seo Hee Su, a college student and aspiring lyricist with zero self-esteem and zero self-love, who discovers a mysterious lyric note that makes anyone fall in love with her for a month and gets intertwined with Jung Si Ho.