Exciting Milk (1996)

Humanity is prospering through the expansion of the Earth's development, but natural destruction has also become extreme. One day Amon, a scientist who opposed the destruction of nature, decided to return to the Earth 150 years earlier via time machine and protect nature. You follow a time cop from the future, Milk, and an introverted high school girl named Kurumi, who are forced to share the same body by a strange turn of events. They must stop an eco-terrorist named Amon, who creates monsters from plants. This series of short VNs is very short, being constituted of two mere episodes, for a total playtime barely reaching 20 minutes. Nevertheless, it may have the best animated sequences you'll ever see on PC-98. Too bad it was canceled so quickly, it certainly had some potential.