It happened suddenly: The dead began to rise and Japan was thrown into total chaos. As these monsters begin terrorizing a high school, Takashi Kimuro is forced to kill his best friend when he gets bitten and joins the ranks of the walking dead. Vowing to protect Rei Miyamoto, the girlfriend of the man he just executed, they narrowly escape their death trap of a school, only to be greeted with a society that has already fallen. Soon, Takashi and Rei band together with other students on a journey to find their family members and uncover what caused this overwhelming pandemic. Joining them is Saeko Busujima, the beautiful president of the Kendo Club; Kouta Hirano, an otaku with a fetish for firearms; Saya Takagi, the daughter of an influential politician; and Shizuka Marikawa, their hot school nurse. But will the combined strength of these individuals be enough to conquer this undead apocalypse?

In future Japan, in a time when android housekeepers have become commonplace, society strictly abides by the Three Laws of Robotics, which all androids must follow. Under the influence of the Robot Ethics Committee, androids are treated the same way as lesser technology, such as household appliances. However, a minority with an adoration for androids exists, categorized as android-holics, and are shunned by the general public. Rikuo Sakisaka was raised to accept society's precept about androids, and is perfectly aware that they are not human. That is, until the day he discovers a strange message buried within the activity logs of his household android, Sammy. This leads him to Eve no Jikan, a cafe with only one rule that its patrons must adhere to: there must be no distinction made between humans and androids. Curiosity drives Rikuo to learn more about the shop, and he attempts to unearth the reason behind Sammy's peculiar behavior.

Seirei Academy is a prestigious school attended by the very best students in Japan. Alisa Mikhailovna Alya Kujou, the half-Russian and half-Japanese treasurer of the school's student council, is known for her intelligence, stunning looks, and rigid personality. Contrasting her near-flawless persona, Alya's unmotivated classmate Masachika Kuze slacks off during lessons and seems to show no interest in her. Initially irritated, Alya gradually becomes more intrigued by Masachika and starts expressing her affection for him in Russian. However, she is oblivious to his secret—he understands the language fluently! Due to a childhood friend who was temporarily staying in Japan, Masachika has been studying Russian in hopes of reuniting with her. As the two spend more time together, the playful and eccentric relationship between them quickly deepens. In the meantime, both must learn to navigate their new growing feelings for one another.

Patema is a plucky young girl from an underground civilization boasting an incredible network of tunnels. Inspired by a friend that mysteriously went missing, she is often reprimanded due to her constant excursions of these tunnels due to her royal status. After she enters what is known as the forbidden zone, she accidentally falls into a giant bottomless pit after being startled by a strange creature. Finding herself on the surface, a world literally turned upside down, she begins falling towards the sky only to be saved by Age, a discontented student of the totalitarian nation known as Aiga. The people of Aiga are taught to believe that Inverts, like Patema, are sinners that will be swallowed by the sky, but Age has resisted this propaganda and decides to protect his new friend. A chance meeting between two curious teenagers leads to an exploration of two unique worlds as they begin working together to unveil the secrets of their origins in Sakasama no Patema, a heart-warming film about overcoming differences in order to coexist.