Ai Yamaguchi

Kiyoha rises from the lowly courtesan ranks to the high class position of Oiran in the steamy red-light district of Yoshiwara. She is determined to stand on her own two feet and live life as she pleased.

Kae Horii moves into her new flat in an undisclosed area of Kyoto. While unpacking her belongings, she discovers a hidden compartment behind a inconspicuous mirror. In that compartment, Kae finds a notebook, that turns out to be a diary belonging to the previous tenant. Later that evening Kae starts to read the diary. The writer of the diary is Ibuki Mano, a young lady about to embark on her first year as an elementary school teacher. Ibuki is also in love with a man named Takashi, who may or may not hold similar feelings for Ibuki.

Teacher Akira Suzuki breaks away from long-held customs and norms at his school. He tries hard to have the ideal classroom by using his own "Suzuki method". The new semester begins. His homeroom 2-A class is about to have a student council election and preparations for a school festival. A man then takes a female student hostage...