A violent rebellion in the capital led by Duke Rugis Camellia wreaks havoc on the Kingdom of Hortensia, leaving every member of the royalty either dead or missing. Barely escaping with his life, knight Maurice Baudelaire flees the ensuing chaos after his brother, Fernando Albert, is killed by a werewolf in battle. To honor his legacy, Maurice treks to Albert's house and delivers his son, Alfred Ober, his father's sword. Despite his grief, Alfred is reminded of a vow he pledged with his father—to become a knight so that he could protect his land, the Albert Dominion. Under Maurice's tutelage, Alfred hones his combat skills to fulfill his promise. Training alongside him is Marius Casterede, an intriguing boy whose age seems to be more than meets the eye. Elsewhere, Pope Alexi Valdebron delivers the order to capture the missing princess and crowns Charlot D'Hortensia as the new king. Hortensia Saga is a tale of camaraderie and determination as Alfred, Marius, and Maurice work together with friends of past and present to bring forth light amidst Hortensia's dark times.

Miki Takekasa is an introverted high schooler who does not socialize with her classmates. However, she wants to know what fun really is, waiting for someone who could help her understand its true meaning. One day after school, she crosses paths with her classmate Aya Takayashiki, who takes her on a little adventure. Miki discovers wonders she had never seen before, opening a way to change her withdrawn life. On their way home, Miki and Aya see their class representative Midori Oono entering Saikoro Club, a store specializing in board games. After trying out a German board game, Miki soon understands the kind of fun she had been looking for: playing various games after school along with the friends and acquaintances she makes from her newfound pleasure.

Sixth-grade student Kanna Hayama's love of running becomes a source of grief when she loses her mother Yayoi, whom she shared this passion with. However, her disposition changes after she accidentally discovers an astonishing truth about Yayoi. One day, Kanna unexpectedly encounters a divine messenger in the form of her favorite rabbit Shiro and a demon boy named Yasha. They reveal to the girl that her mother was an Idaten—a descendant of the gods endowed with incredible speed and entrusted to bring offerings from all over Japan to the annual Kamiari Festival in Izumo. As Yayoi's daughter and the new possessor of the Idaten amulet, Kanna is expected to take over this responsibility; otherwise, there will be dire consequences for the country's fate in the year to come. Enticed by the prospect of seeing her mother once more at the deities' event, Kanna accepts the challenge and enlists Shiro and Yasha to help her on her quest. Unbeknownst to her, there is more than meets the eye to this marathon-like journey that will test not only her physical condition but also her heart's resolve.

After unknowingly participating in a kidnapping, college student Yuuya Nomoto finds his friends brutally murdered by Hitomi Uzaki, the high school girl they attempted to abduct. Forced to drive her to an undisclosed location, he finds himself being wagered as the prize for a death match between two Therianthropes, superpowered human-animal hybrids created through advanced gene therapy. As one of these hybrids, Hitomi uses the speed and fearlessness she gained from her ratel genes to viciously dispatch her foe and save Yuuya from certain death. Waking up hours later hoping the whole event was only a nightmare, Yuuya realizes that he has become embroiled in a secret proxy war between four large Japanese business conglomerates, with the winner taking control of the economy. As her sole albeit unwilling investor, his life is now directly linked to Hitomi's ability to participate in underground bloodsport matches known only as Killing Bites.