The plot centers around a Grail War faultily copied from the Third Holy Grail War in Fuyuki. After the end of the third Grail War, an organization from the United States that has magi separate from the London based Mage Association as members took data from Fuyuki's Grail War and planned their own ritual. After seventy years, they used the city Snowfield as the Sacred Land for their own Grail War. They were unable to successfully copy every aspect of the ritual, which lead to it acting only as an imitation that has lost the Saber class and allowed for the summoning of strange Servants due to the definition of a "hero" being blurred.

A newbie Red Blood Cell is one of 37 trillion working to keep this body running. But something’s wrong! Stress hormones keep yelling at him to go faster. The blood vessels are crusted over with cholesterol. Ulcers, fatty liver, trouble (ahem) downstairs … It’s hard for a cell to keep working when every day is a CODE BLACK! (Source: Kodansha USA)

Feeling the pressure from the marriage frenzy around her, Tsukako, a 28-year-old single office lady and an otaku, hastily dives into the world of matchmaking. Seduced by the smooth words of Nishikami, a handsome marriage consultant at the agency she rushes into, Tsukako carelessly agrees to a contract stating, "If she fails to marry within a year, her soul will be taken." Shockingly, Nishikami turns out to be a Shinigami (death god)! (Source: Pixiv Comic, translated)

Makoto Shimizu is just an ordinary office worker, blending in seamlessly with her colleagues on the job... That is, until her coworker Akane Maekawa discovers her well-hidden secret: in her spare time, she draws and sells girls' love comics! Akane is the last person Makoto would think of as a nerd, but as the two grow closer, it starts to seem like Akane may have a secret of her own... (Source: TOKYOPOP) *Note: Includes 3 bonus chapters.*

In a certain regional city of Japan called Fuyuki City, a Holy Grail is said to appear once every few decades, capable of granting any wish to its owner. Seven magicians form contracts with seven heroic spirits and engage in the conflict known as the Holy Grail War to obtain the Holy Grail. Rin Tohsaka, who was raised in a family of magicians, also aims to participate in the Holy Grail War, following her father Tokiomi Tohsaka's legacy. However, as she attempts to summon the greatest heroic spirit Saber, things take an unexpected turn...

*From Akane Shimizu, winner of Shounen Sirius' Rookie Award, comes an informative tale about anthropomorthized cells!* Strep throat! Hay fever! Influenza! The world is a dangerous place for a red blood cell just trying to get her deliveries finished. Fortunately, she’s not alone…she’s got a whole human body’s worth of cells ready to help out! The mysterious white blood cell, the buff and brash killer T cell, the nerdy neuron, even the cute little platelets—everyone’s got to come together if they want to keep you healthy! (Source: Kodansha USA) *Note: Includes the spin-off one-shot "Hataraku Saibou: Kansen-hen".*

Zoe lleva una vida apacible junto a su madre en la cabaña del bosque. Demasiado tranquila, diría ella. Hasta que un día, un carruaje se estrella contra su gallinero y, para su sorpresa, no solo está conducido por la princesa del reino..., ¡sino que dicha princesa es exactamente igual que ella! La princesa Madeleine, que quiere tomarse un año sabático, le ofrecerá intercambiarse y tomar su lugar en el instituto Royal Rose, donde se reúnen todos los príncipes y princesas de los reinos colindantes para elegir entre ellos a sus futuros emperadores. A Zoe no le interesa nada de esto, pero aceptará, porque su amor de la infancia es el príncipe Drake, prometido de la princesa Madeleine y con el que tuvo un encuentro fugaz en su niñez. Pero cuando llega a su nueva casa, nada es como esperaba: todos los estudiantes de Royal Rose odian a Madeleine, ¡y especialmente Drake, con el que rompió su compromiso meses atrás! Zoe no puede volver a casa hasta que regrese Mady... ¿Cómo logrará ganarse el cariño de toda la gente que desprecia a la auténtica princesa?