The author wrote an extra chapter about "The Opposite Personality of Twins". For everyone's convenience, some of the author's eccentric thoughts are gathered here. There are various weird elements such as orthopedics, green plum, heavenly drop, fantasy, magic, and history.
You should be able to understand it even if you haven't read the original work written by the author.
Female protagonist setting: The name is Fangtani Shichi, Rei's twin sister, a genius, strong in reasoning, somewhat arrogant, considerate and understanding by nature, likes children, has good hearing, poor eyesight, and is good at fighting.
Intention: Just the product of self-excitement in the brain
