Park So-dam, Kong Ye-ji, Joo Bo-bi and Park Se-in, who appeared as main characters in the movie, are actors from the School of Drama, Korea National University of Arts.
Since they are from the same school, the director was worried that he might favor Korea National University of Arts.
At the audition, the majority of responses were that actors from School of Drama stood out particularly. According to Park So-dam‘s explanation, the teaching method of the School of Drama was very special, and it was based on using the body well.
The meaning of using the body well includes dance, improvisation, action, mime, free expression and vocalization. It is said that Korea National University of Arts focuses only on these basic skills.
At the time of the audition, people sat down and said lines then stood up and acted. However, actors from Korea National University of Arts were so good at acting that they stood up and expressed.