In 2014, aliens suddenly appear on earth and propose to trade humanoid robots called "EXOFRAMES" for a small price. The outstanding versatility and exceedingly low cost of the alien technology is immediately put to use in industries and battlefields across the globe. Beyond pre-existing weapons, even the existing social order seemingly become obsolete.

A girl who has recently moved temporarily from the city to a mountain school because of her father's work feels distant from her new classmates. Koichi gets interested in the girl, but he can't get close to her. The girl had wanted to return to her city life as quickly as possible, but by chance she happens to meet a real-life wind god…

[Source: Japan Media Arts Festival Overseas Promotion]