Naisho no Tsubomi

Each volume depicts a different heroine. **Volume 1**: Main character of the story is Tachibana Tsubomi (立花つぼみ), a fifth grader dealing with issues such as her mother's pregnancy, her first period, and the strange feelings she has started to get when she has been around boys. **Volume 2**: Main character of the story is Kusakabe Tsubomi (草壁つぼみ), a fifth grader, who encounters an alien wanting to do research of earth. It turns out he has picked Tsubomi to be his research subject. **Volume 3**: Shiina Tsubomi (椎名 つぼみ) **Volume 4**: Katanashi Tsubomi (小鳥遊 つぼみ) **Volume 5**: Aizaki Tsubomi (相崎 つぼみ) **Volume 6**: Nike Tsubomi (仁家 つぼみ) **Volume 7**: Yagi Tsubomi (八木 つぼみ) **Volume 8**: Honda Tsubomi (本田 つぼみ) ***Note**: Won the Shogakukan Manga Award for children's manga in 2009.*