Cinque Izumi, Nanami Takatsuki, and Rebecca Anderson must once again embark on a journey to the continent of Flonyard and participate in the friendly war games of the three allied nations: Biscotti Republic, Galette, and Pastilage. Cinque is Biscotti’s hero, who also happens to be the cousin of Galette’s hero Nanami. Rebecca is Pastillage’s hero and a dear friend of Cinque. Dog Days'' begins in the human world. Rebecca prepares her things for her journey back to Pastilage from Japan. Meanwhile, Cinque and Nanami set out to travel to Biscotti and Galette, respectively, all the way from England, when suddenly, a freakish streak of bad luck—in the form of lightning, of course—sends them off course. They soon find themselves in the great Dragon Forest, protected by a Dragon Priestess named Sharu. The Dragon Priestess informs them that demons threaten to invade the forest, as well as the whole continent of Flonyard! It looks like a real war is about to begin in Dog Days''. Can these three heroes save the whole continent from these evil beings?

Dog Days takes place in the world of Flonyard, an alternate Earth inhabited by beings who resemble humans, but also have the ears and tails of specific animals. The Republic of Biscotti, a union of dog-like citizens, has come under attack by the feline forces of the Galette Leo Knights. In an effort to save Biscotti, Princess Millhiore summons a champion from another world in order to defend her people. That champion is Cinque Izumi, a normal junior high student from Earth. Agreeing to assist Biscotti, Cinque retrieves a sacred weapon called the Palladion and prepares for war. In Flonyard, wars are fought with no casualties and are more akin to sports competitions with the goal of raising money for the participating kingdoms. Cinque is successful in his role as Biscotti’s champion, but learns that a summoned champion cannot be returned to their home world. The scientists of Biscotti will endeavor to find a way for Cinque to return home, but until they figure something out, he must serve Princess Millhiore by continuing to fight as Biscotti’s hero.

Takato and Guilmon go on vacation to Okinawa and meet a fellow tamer, Minami. Back in Japan, a popular computer pet suddenly becomes a virus, infecting all of the computers who have it. As the virus spreads, Takato tries to figure out why digimon are all attacking his new friend, and what her connection is to the virus.

Devil May Cry follows the story of the demon hunter known as Dante. As a half demon, half human, he uses his trusty sword Rebellion and his two guns Ebony and Ivory to take on missions. Dante owns and runs "Devil May Cry," a business that specializes in hunting and killing demon-related problems. Based on the video game series "Devil May Cry."