As Diversas Faces de Ito (2017)

The male lead is a webtoon writer and writes a series about his four ex girlfriends assigning them a character. The female lead is a producer who approaches him to turn it into a movie.

Yazaki Rio is a 32-year-old screenwriter, who was once popular but has not written any new titles in a while. One day while she was giving a lecture, she distributes a questionnaire to the attendees. Later when reading the answers, she notices that 4 women are all talking about a man named "Ito". With the encouragement of her producer, she decided to write a new TV series about the women and their relationship with "Ito".

Yazaki Rio is a 32-year-old screenwriter, who was once popular but has not written any new titles in a while. One day while she was giving a lecture, she distributes a questionnaire to the attendees. Later when reading the answers, she notices that 4 women are all talking about a man named "Ito". With the encouragement of her producer, she decided to write a new TV series about the women and their relationship with "Ito".

If you loved Kimura Fumino's role in this drama
You should watch Ito Kun, It's her best work in my opinion.
Watch the drama first, then the movie ( Ito Kun)