First-year rookie actress/theater member Himari Kosaka (21) is captivated by the world of mascot performers. Despite the strict rule of never speaking while in costume, she perseveres through grueling training, determined to become a mascot star. This intimate documentary captures her sweat and tears as she endures electric shock training and remote-controlled vibrator stimulation during event appearances. Her final test: a 4-way sex session in full mascot costume, with no reactions allowed. Will Himari's dream come true...?