"First muscle training animation ever," a 16-year-old girl named Hinako leads exercises in push-ups, sit-ups, and squats. Hinako was once a human, but she was turned into an anime character when she was a second-year middle-school student.

At the time of the ceremony of entry to the college, a young boy named Ushino Hayama finds Sara a girl whom he met ten years ago. From this day, a change has taken place in him, and notices that can now control some water. After having succeeded the swimming championships, he discovers deep sea diving.

Based on a shoujo manga written and illustrated by Shinohara Chie serialised in Shoujo Comic. The original story follows the struggles of a teenage girl after she finds herself turning into a lycanthropy-leopard and having to battle her newly found predatory instincts. In 1987 an animated music video of 30 minutes length was made based on the award winning manga.

Our heroine has been kidnapped and her two somewhat ditzy friends decided to save her in a war machine they found in her house. Unfortunately they have little idea of how it works so let the random destruction begin.