Arimura will be playing the role of Sayaka which means that she has to dye her hair, put on heavy makeup and wear earrings on her belly button. Sayaka was such a troublemaker at school and suspended so many times that her mother forced her to go to Tsubota's cram school in the summer of her second year in high school. Despite being very bad at her studies to the extent that she was judged as to be at Primary 4 only, Sayaka managed to turn the situation around and qualify for entry into Keio.
Filming will begin in January next year. Arimura had already met the real Sayaka last month and will learn how to speak in the Nagoya dialect and girls' slang from her when they meet again before the start of the filming.