In August 2021, Kamishiraishi portrayed Minami Sakuda in the film One Summer Story, adapted from the manga Kodomo wa Wakatte Agenai [ja] by Retto Tajima.[45] Since the character is a backstroke swimmer and she has portrayed a breaststroke swimmer in Idaten and front crawl swimmer in Mr. Hiiragi's Homeroom, she remarked that if she gets a butterfly swimmer role, she would have achieved a unique "medley" of portraying characters of all four competitive swimming styles.[2]