Mia-chan is a pure, innocent beauty with long hair styled in twintails. She has a slightly brother-obsessed personality, preferring older men who resemble her brother, and possesses a genuinely naive and childlike nature. Unfamiliar with the adult world, she tends to obediently follow the demands of adults, prioritizing their desires over her own feelings. This story portrays her gradual journey into adulthood, as she gets caught in the web of adult desires while still retaining her innocent heart. Her small breasts and lack of knowledge make her easily compliant with adult demands, illustrating her coming-of-age process. A heartbreaking coming-of-age tale, as her pure soul is torn apart by the adult world.