Two men have just arrived at a location known as Quindecim and are unable to remember how they got there. They are immediately greeted by a young woman who escorts them to a small bar, where a bartender awaits them. They are told that they will have to participate in a game, randomly chosen by roulette, and will be unable to leave until its completion; if they refuse, the consequences will be dire. In addition to the rules of the game, the two men are told to play as if their lives are at stake. The game that has been chosen is billiards. But there's more to it than just pocketing pool balls, as the two are about to find out the outcome could mean life or death. [Written by MAL Rewrite]

A battle is about to begin in Tokyo: the Shaman Fight, a tournament held every five hundred years where shaman—those who can command spirits—confront each other in combat. The victor of this contest becomes the Shaman King and the only one who is able to contact and control the Great Spirit, allowing them to reshape the world as they please through its immense power. During a late night walk, Manta Oyamada runs into his classmate, the carefree You Asakura, who invites him to come stargazing with some friends, who, to Manta's horror, turn out to be ghosts from a local cemetery! However, the knowledge that Manta possesses—a rare sixth sense that allows Manta to see these spirits—endears the boy to You. So when You finds out that his new comrade has been beaten up by a local gang, he decides to avenge him with the help of Amidamaru, a samurai ghost whose tomb was broken by the gang leader. Soon Manta uncovers more about the world of spirits, including the Shaman Fight, in which his new friend You aims to claim victory. [Written by MAL Rewrite]

This OVA takes place in between episodes 8 and 9 of the first season of Hakuouki. Yukimura Chizuru goes on a reconnaissance mission in Shimabara as a geiko for the Shinsengumi. Each episode unfolds the events of the days leading up to, during, and after the operation. It intermittently reveals each captain's involvement as well as that of a few demons in the affair. Each individual episode primarily focuses from the third person perspectives of: Okita Souji, Saito Hajime, Harada Sanosuke, Toudou Heisuke, Hijikata Toshizo, and Kazama Chikage.

Despite the kaleidoscopic magic ingrained in everyday life, Hitomi Tsukishiro's monochrome world is deprived of emotion and feeling. On a night as black and white as any other, amidst the fireworks spreading across the sky, Hitomi's grandmother Kohaku conjures a spell, for which she has been harnessing the moon's light for 60 years, to send Hitomi back in time to the year 2018 when Kohaku was in high school. Hitomi's mission seems unclear, but her grandmother assures her that she will know when she gets there. Following a trip through time aboard a train driven by a strange yellow creature, Hitomi finds herself in stoic artist Yuito Aoi's room, and his drawings flood her world with color. What is Hitomi's purpose there, and why do Yuito's drawings return such breathtaking color to her drab world?