In 1984, A girl named Asuka was an ordinary kendo-loving girl with 2 friends. Miki and Yuki. In the morning, Asuka was reading a book named "Season of the Sakura", when there was a knock at the door. Asuka checked the door and she was kidnapped. Miki and Yuki heard about the news and they were shocked. They went o the place and saw a gray robot named simply "Boss". Boss was mad and took off his cape, revealing a big gray shaped syringe. Boss kicked them two and they put them in a private room.