Boo Boo Booster

The year is 20XX and the setting is New Tokyo. Suddenly, a huge object in the shape of a peach crashed down. Most of the New Tokyo urban area was destroyed. Soon after, butt-shaped unidentified creatures begin to appear all over Japan. The frightening thing they have in common is that they project their excrement onto humans. Their power was expanding day by day, causing people to suffer. ...... In the midst of all this, a young man who loves potatoes got his hands on a mysterious potato...!