Boku no Imouto wa "Osaka Okan"

In a city of the dead, long since ruined and far from human civilization, lives a single human child. His name is Will, and he's being raised by three undead: the hearty skeletal warrior, Blood; the graceful mummified priestess, Mary; and the crotchety spectral sorcerer, Gus. The three pour love into the boy, and teach him all they know. But one day, Will starts to wonder: "Who am I?" Will must unravel the mysteries of this faraway dead man's land, and unearth the secret pasts of the undead. He must learn the love and mercy of the good gods, and the bigotry and madness of the bad. And when he knows it all, the boy will take his first step on the path to becoming a Paladin.

Shinya Yukimura and Ayame Himuro are two scientists that want to find out if love can be solved by a scientific theory. These two scientists also have feelings for each other and want to be able to solve their feelings through similar theoretical facts. With this perfect opportunity, these scientists will attempt to solve the theory of the love they express for each other.

Shinobu is a naive ninja-in-training. In order to test her ninja abilites, she must steal the panties of all the high school girls. The first house she stops at is the abode of one Kaede Shiranui, who happens to catch Shinobu in the act. Kaeda is the voice of reason and the two girls become quick friends, despite a round yellow ball-thing who claims to be a ninja master and tries to get in the way of their friendship.

The Meiji Era was one of great renewal for Japan, where swords and killing were outlawed. However, many survivors from the time of Revolution still live, lurking in the shadows and waiting for a chance to use their killing blades again. Only Kenshin Himura, formerly one of the most brutal of killers, hopes to keep his swordsman's honor and still live in the new era.

Mayuko Chigasaki is an ordinary girl from the countryside, who now is attending university in big city Tokyo. She struggles each day to make ends meet while studying for her exams, barely scraping up the yen to afford bus fare to and from school. And at the end of the day, she comes home to a gluttonous, freeloading alien living in her closet!

Yuugo Hachiken enrolled in Ooezo Agricultural High School for the reason that he could live in a dorm there. In some ways he chose Ooezo in an effort to escape the highly competitive prep schools he had attended previously, but he was faced with an entirely new set of difficulties at Oezo, surrounded by animals and Mother Nature. After growing up in an average family, he began to encounter clubs and training the likes of which he had never seen before.

The Great Jahy, the Dark Realm's second-in-command, cuts a frightening figure, feared and revered by all. But when a run-in with a magical girl results in the destruction of the precious mana crystal, the Dark Realm falls, transporting the newly tiny and powerless Jahy to the human world! Unfortunately, plotting the revival of the Dark Realm from a cramped, crumbling one-room apartment is no easy feat when you have rent to pay and a job to keep!

Ars Louvent is reincarnated in another world as the young son of a minor noble who owns a small domain. Ars is not particularly strong or intelligent, but he was born with the Appraisal Skill that's able to see others' abilities and statuses. He uses his skill to find the best hidden talents in the world to make their small, weak domain into the best.