Eiri Kurahashi is a Japanese art student who works in an antique shop. His friends begin to notice a dramatic, and rather concerning, change in Eiri, as he becomes more absent-minded and his behavior completely changes. They quickly decide to blame their friend's troubles on a girl. They may be right, however, as Eiri has begun seeing a beautiful, doll-like girl trapped within an antique Venetian glass that his uncle bought in France. She seems to be living in a strange other world, contained entirely inside this glass, but her image refuses to leave Eiri's mind. His sketchbook becomes filled with her likeness, and he realizes he has become completely infatuated with this strange little girl. When he recognizes her in a portrait by the mysterious Italian artist, Marchello Orlando, he learns her name is Cossette d’Auvergne, and that she was tragically murdered along with the rest of her family. One night, as he closes up the shop, he hears a voice asking him not to leave. Finally making contact with the object of his obsession, he makes a deal that he doesn't fully understand. [Written by MAL Rewrite]

Kuroo Hazama, also known as "Black Jack," is a legend in the medical world. Famous for being one of the best, as well as not having a license, Hazama and his assistant Pinoko save countless lives that other doctors cannot... for a price; an exorbitant price, in fact, which causes many to view the genius as greedy and heartless. Despite these claims, however, none can deny his skill and the lengths that he will go to treat his patients. This dark medical drama tells the story of the ominous and mysterious world of underground medicine as Black Jack risks his life to cure some of the most bizarre diseases imaginable, even if it means breaking every law in the process. [Written by MAL Rewrite]

After the death of his parents, a young Mirai Kakehashi is left in the care of his abusive relatives. Since then, he has become gloomy and depressed, leading him to attempt suicide on the evening of his middle school graduation. Mirai, however, is saved by a pure white girl named Nasse who introduces herself as a guardian angel wishing to give him happiness—by granting him supernatural powers and a chance to become the new God. In order to earn the position, he must defeat 12 other "God Candidates" within 999 days. Soon, Mirai begins a struggle to survive as a terrifying battle royale erupts between himself and the candidates looking to obtain the most power in the world.

In the senior high school division of Shuchiin Academy, the student council president and vice president, Miyuki Shirogane and Kaguya Shinomiya, appear to be the perfect couple. Kaguya is the daughter of a wealthy conglomerate family, and Miyuki is the top student at the school and well-known across the prefecture. Although they like each other, they are too proud to confess their love, coming up with many schemes to make the other confess.