Mizuhosan, a public housing housewife who is actually an active music teacher taking a leave from school, feels insecure about her husband's income and begins contemplating divorce. Lacking self-confidence and afraid of new challenges, she finds unexpected stimulation from someone other than her husband. "I'm shy and can't let myself go," she honestly admits, openly acknowledging her awkwardness—but the moment she touches his cock, she instantly becomes flustered. Her lips tremble as something deep within her heart begins to awaken. Amid her everyday worries, a glimpse of new possibilities starts to emerge in her eyes.