In Episode 5 of "Tsundero," the storyline centers on Aoi, the captain of her school's rhythmic gymnastics club. Despite her talent, Aoi struggles with severe shyness during public performances. To overcome this, she seeks the assistance of her coach, who devises an unconventional and intimate training regimen aimed at boosting her confidence. Over a period of ten days, Aoi is subjected to increasingly provocative and embarrassing scenarios under the guise of preparation for the upcoming tournament.