Tokyo in the 1970s. Evil spirits are threatening the human world and the only ones who can stop them are a group known as the Spirit Patrol. Sent from the underworld the team consists of the hot-headed Enma, the stuck-up Yukiko, the half-water sprite Kapael and Chapeau-jii — the old man spirit in the form of a hat, who guides the group. This may not bode well... though.
At Kaimei High School, the Living Assistance Club (aka the Sket Brigade) was organized to help students with problems big or small. Most of the time, though, they hang out in their club room, bored, with only a few trivial problems floating in every once in a while. In spite of this, they still throw all their energy into solving these worries.
A group of friends have customized their microwave so that it can send text messages to the past. As they perform different experiments, an organization named SERN who has been doing their own research on time travel tracks them down and now the characters have to find a way to avoid being captured by them.
Hideyoshino is an average girl who always seems to find trouble wherever she goes. One day, Hideyoshino notice a blue light coming from inside a local Shrine and see a mysterious person performing a magic spell. In a stroke of bad luck, Hideyoshino trips and crashes into the shrine, prompting the magic spell to spiral out of control and sends her back in time to the Sengoku Era. But Hideyoshino realizes that everyone in the world is female. She then decides to help Oda Nobunaga find the Crimson Armor which is said to allow the person wearing the armor to conquer all of Japan.
In the big city of Yanagihara, the masses of people and buildings make it a bustling place to exist, and yet, people will meet and fall in love here in this city.
Follow the adventures of three ordinary girls as they make life’s awkward moments a thousand times worse. Along with a colorful bunch of classmates, they learn their most important lessons the hard way. Meanwhile down the street, a pocket-sized professor makes life difficult for a robot who just wants to be normal. But normal is the last thing you can expect in a town where salmon falls from the sky. In fact, the only thing you can count on is your friends, but even they are totally weird.
Some guys have no luck; he’s got no pulse. That’s life for poor unfortunate, undead Ayumu. First, he was murdered by a serial killer. Total bummer. Then he was resurrected as a zombie by a cute little Necromancer. That seemed pretty cool until she moved into his house, refused to speak, and forced his rotting carcass to do all the cooking. After that, a magical girl in a pretty pink dress used her matching chainsaw to chop his corpse in half. Luckily, the Necromancer’s powers of resurrection trumped those of the chainsaw chick, so instead of dying (again), Ayumu became the world’s first magical girl zombie. There’s also a voluptuous vampire ninja who thinks zombie boy’s a pervert – and a hideous crayfish demon who wants to devour him. Confused? All you gotta know is this: zombies, frilly dresses, demons, and moe chainsaws. Pink. It’s the new dead.
Violent delinquent Oga encounters a baby one day, which crawls onto his back and immediately forms an attachment to him. Though he doesn't know it yet, this baby is named Kaiser de Emperana Beelzebub IV, or "Baby Beel" for short—the son of the Demon Lord!
Aichi Sendou is a timid third-year middle school student who has always lived his life looking backwards rather than forward. However, he has a card called "Blaster Blade" that was given to him when he was little, which is the sole thing that sustains him. Then Toshiki Kai, a cool-hearted high schooler, introduces Aichi to a card game called "Vanguard". When participants battle they picture they are on a planet called "Clay", and since Vanguard features a never before seen game system it has become popular around the world. Aichi immediately likes Vanguard, so he begins to play it with his friends Misaki Togura and Kamui Katsuragi, and others like his new rival Kai (who is one of the best Vanguard players). Aichi plays every day and he strives with all his soul and heart to play better, so when he battles Kai, Kai will recognize Aichi's worth.
Amamizukan is an apartment complex where no boys are allowed. Tsukimi, a girl who adores jellyfish, lives there happily with her friends who all have nerdy obsessions of their own. Their peaceful lives gradually start to change when a beautiful woman helps Tsukimi out of a pinch. She stays overnight at the apartments—but it turns out "she" is really a "he".
Keima is a dating sim champion. Cute girls are rendered powerless by his irresistible game playing techniques. Too bad things aren't that way in the real world. That is, until his tempting game playing causes a real live—and very bubbly-cute—demon hunter named Elsie to materialize! Now Elsie wants Keima to help her free hot girls from sneaky demons who secretly possess them.
Squid Girl has come to the land from the depths of the sea to conquer humanity in revenge for pollution of the ocean. Unfortunately she ruins the first house she uses as an invasion base and has to work to pay for repairs. Of course, she can't overcome the Aizawa sisters who manage the house, so who knows whether she can subjugate humankind.
The story takes place during the Westernization Movement in an alternate world where humans and spirits coexist. To solve the problems that arise between the two, human lieutenants are partnered with half-spirit girls to form the Ministry of Spirit Affairs.
Oreimo follows the daily life of an ordinary high school boy named Kyousuke Kousaka. Kyousuke’s younger sister Kirino is a pretty fashion model, but also hides a dark secret of being an otaku of adult games. Kyousuke is the only person to whom Kirino reveals her hidden obsession and other issues.
Panty and Stocking are nasty angels who were banished from the pearly gates for being foul-mouthed bad girls! Now they spend their days hunting ghosts in the lecherous abyss between Heaven and Earth. Panty likes sex, Stocking likes sweets, and their afro-sporting main man Garterbelt has a fetish we can't mention.
Ryōko Ōkami is a spunky high school girl who is a member of a "fixer" club called the Otogi High School Bank. She fixes the school's problems with her partner Ringo Akai ("Akazukin-chan").
Ko Ichinomiya's family motto is "Never be indebted to anyone," but after losing his pants and falling into the Arakawa River, he quickly finds himself in debt to his savior, the cutely insane Nino who happens to live under the bridge. To repay her, he vows to help her with her desire to "experience love." Along the way he'll meet the river's other residents, including a hot-blooded kappa, a Sister in drag, and a literal rock star.
Angel Beats takes place in the afterlife and focuses on Otonashi, a boy who lost his memories of his life after dying. He is enrolled into the afterlife school and meets a girl named Yuri who invites him to join the Afterlife Battlefront — an organization she leads which fights against God. The Battlefront fight against the student council president Angel, a girl with supernatural powers.