Mika, a working mother from the countryside, is a voice trainer who graduated from a music university. Currently balancing her career and family life as a mother of one, she works as a vocal specialist. Her demonstration of opera-style pronunciation exercises feels just like attending a professional lesson. As the practice progresses together, it gradually turns into a secret voice lesson. Gently guiding you to "use your abdominal voice," her instructions take an unexpected turn when her own moans begin resonating deeply from her abdomen.