Oniisama e… (1991 - 1992)

The story revolves around a simple Japanese schoolgirl named Nanako Misato. In the young girl's life, a significant victory occurs. Thanks to her abilities and efforts, she is accepted into a prestigious private girls' school. Her best friend, Tomoko Arikura, also joins her, and both girls are overjoyed. However, Nanako has another close person whom she doesn't tell anyone about - her dear older brother, who works as a teacher in the lower grades.