Onoue Yunoka

A classmate and best friend of Sumi. In contrast to Sumi, Yunoka is shy and timid. She admires the bright and cheerful Sumi. Due to her excellent grades, Yunoka often teaches Sumi how to study. Her parents divorced when she was young. Later, her mother remarried, but she could not stand her second husband and left alone, leaving Yunoka with her stepfather. Living together alone, Yunoka's stepfather begins to succumb to his desire.