A New Challenge (新たな挑戦 Arata na Chousen) is the fourth episode of the Anime. It aired April 28, 2020 (JST).
Tetsuro Iwai, a carpenter who had been in charge of play backgrounds and larger props since the original troupe's days, and Yuki Rurikawa, a clothes and costume designer/maker, had joined, and Mankai is finally starting to become like a real theater company. Meanwhile, Itaru, who wasn't into theater and saw the difference between him and the others on the stage and felt bad seeing them try so hard when he wasn't putting any effort his acting. That was also pointed out by Yuzo Kashima of the former Spring Troupe. The members are now in a state of turmoil by Itaru's proposal to leave. Sakuya, Tsuzuru, and Citron try to come up with a solution to stop him.
- Due to scheduling problems in the production and issues related to the COVID-19 outbreak, episodes 4 were delayed until April 28, 2020.