On the eve of her coming-of-age ceremony, a junior college girl undergoes the intense experience of her first AV appearance, exposing her most intimate parts by showing them with a hand mirror and being penetrated while a male actor scrutinizes her with a magnifying glass. By revealing her pure, innocent self, she is prompted to reconsider what it truly means to become an adult. Her emotions and inner thoughts are deeply portrayed throughout the work, leaving a profound impact on viewers.