In her mid-twenties, Retsuko is a red panda who grapples daily with work-induced stress instigated by an overbearing and sexist superior and belittling colleagues. Despite her hard work, Retsuko's small frame and meek disposition leave her susceptible to subjugation. But when her frustration reaches its climax, Retsuko chooses an unorthodox outlet: death metal karaoke. Although her remedy exists only in her mind, it empowers her to handle the cutthroat and judgmental climate that encases her.