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.

On a whim, first-year Ayumu Tanaka quits the Kendo Club to join the illegitimate Shogi Club. Urushi Yaotome, the president of the club and a master of shogi, is thrilled to finally have a playing partner. As Ayumu's upperclassman, Urushi endeavors to be his shogi mentor and student role model. Too often, however, she finds herself blushing with embarrassment! Stone-faced and honest, Ayumu sees no issue with calling Urushi "cute." Although Ayumu likes her, he refrains from confessing and promises himself to first beat her in a game of shogi. Through school life and shogi games, the two students have many hilarious and heart-warming adventures. Ayumu enjoys every second with Urushi, but he is still a long way from beating her in shogi. With the commitment he made to himself, will Ayumu ever get the chance to confess his feelings to Urushi?

Atsushi Kamiya is a former captain at Kakegawa High School and the world-renowned "courageous captain" for a famous Italian soccer team. Hideto Tsuji is a student at the same school, who seems uninterested in the now-weakened soccer team. Their meeting is the start of a new legend...

After Musashi rescues Michiru Saruwatari from a demon, his friend Kojirou Kanemaki discovers that his father was a member of the Uesugi clan. Determined to learn more about his own past, Kojirou—alongside his Kanemaki clansmen—decides to participate in Uesugi's punitive expedition against the demon lord of Awajima Island: Yamata no Orochi, an eight-headed dragon that threatens to engulf the entire region. However, upon joining Uesugi's military alliance, Musashi faces the harsh reality of fighting against powerful demons. Humiliated by his lack of power and inability to work in groups, he has to learn how to cooperate with his newfound allies. Meanwhile, the Obsidian Eight—a group pursuing the Obsidian Goddess that dwells within Musashi's body—resumes its hunt for Musashi, and plans to thwart the ongoing island operation. As the situation grows chaotic, Musashi and his friends must foil the machinations of the various factions conspiring to seize the Obsidian Goddess.