劉亞仁
In November 2018, Yoo starred in the crisis film "Default", taking over the role of Yoon Jeong-hak, who bet on the crisis after leaving the securities company and forecasting national bankruptcy. This character gave the impression that "is different from the youth that Yoo Ah-in has represented before", as in, "a person who represents the desire of ordinary people" and "a person who embraces the crossroads of the older and younger generations three-dimensionally." Yoo said he wanted to be "a medium to understand two generations at the same times," and he starred in the film with the thoughts of "how to accept the established system" and "what era we're living in right now." He also said the reasons he participated in this movie were because the movie dealt with the story in "a polite approach," and it was interesting that a female character deals with the country’s major crisis and tries to solve it. In response, co-star Kim Hye-soo described Yoo as "an actor who has healthy mind," and thanked him for his decision to appear in the movie, saying that understanding message of the film and starring in this film is a possible choice because he is Yoo Ah-in.