21-year-old Seira is a bright yet shy girl who works part-time at a karaoke box. Her charm lies in her pure and innocent nature, a rare quality like an endangered species. The moment fingers touch her erogenous zones, she instantly transforms into a lustful woman, but once the stimulation stops, she returns to her pure, saintly self—her reactions are that clear and honest. Her sincerity and cuteness genuinely heal the viewer's heart. Both in personality and behavior, she consistently embodies the appeal of a genuinely good girl.