Ultra-Nyan's adventures continue. This time, he is tasked with finding the cause of the crows' sudden declaration of war upon the cats.

Shun Hashimoto is an openly gay aspiring novelist living in Okinawa who was abandoned by his parents after coming out to them. Mio Chibana is a reserved, orphaned high school student, often found spending his time by the sea. One day, the two meet on the beach, and Shun is instantly captivated by Mio. The days fly by as they slowly begin to grow closer until Mio suddenly announces that he has to leave for the mainland. Three years pass before a 20-year-old Mio returns to Okinawa to confess his love to Shun. However, in those three years, Shun's life has changed. Will he be able to accept Mio's feelings and make such a commitment?

In the 21st century, mankind lives on two worlds. Following the collision of an ice asteroid, massive terraforming has made Venus a planet now capable of supporting life. Colonists from Earth tamed the hostile world and have thrived for four generations. But they also brought the darker side of humanity. Venus is about to get hostile again. Hiro Seno, a hotshot motorcycle jockey, witnesses the first strike against his country Aphrodia, by the rival nation of Ishtar. Huge battletanks and warplanes quickly lay waste to the city. The Aphrodian army is quick to mobilize and retaliate... and despite his opposition to warfare, Hiro finds himself fighting for his life on the front lines. (Source: AnimeNfo)

In an alternate 21st century, the robotics industry undergoes a period of rapid advancement worldwide. By the year 2050, Japan has firmly established itself as the leader in robotic technology and manufacture with Daiwa Heavy Industries. As the technology evolves to include robotic enhancements to the human body, the blurring of the line between man and machine triggers a sudden shift in world opinion. In response, the U.N. passes a unilateral ban of further research and development on robotics in 2067. Japan fiercely objects to this ban, but is unable to prevent its passage. In protest, Japan withdrew from international politics and chose to pursue a policy of high-tech national isolation. While only trade continues, Japan disappears from the world scene. Ten years later, a series of bizarre incidents lead the American technology police agency SWORD to believe that Japan has concealed extensive development of banned technologies through the use of the RACE network. SWORD dispatches a unit of special agents to infiltrate Japan and gather intelligence on the country. Vexille, a veteran agent among the group, uncovers the horrifying truth behind the ten years of isolation.