Aiko grew up in a middle-class family in Tokyo, where her parents emphasized the value of education and discipline. She excelled in her studies and always dreamed of becoming a teacher, inspired by one of her own mentors. After graduating from university with a degree in education, she began working at a prestigious high school. Aiko married her college sweetheart, Kenji, two years ago, but their relationship has become strained due to differences in priorities and communication issues. Despite her challenges, she remains dedicated to her career and students.