Shiratori Ryushi wants to become a picture book writer, and he moves to an apartment, Narutaki-So, in order to go to an art school in Tokyo. Narutaki-so is an old Japanese style one-story house which doesn’t fit in urban scenery. It is owned by the cousin of his mother, and the manager of the apartment is Aoba Kozue. She is his second cousin, and they met with each other when they were children although he doesn’t remember her much. She is in the second grader of a high school attached to Aoba Junior Collage. There are five people living in Narutaki-So. First, Chanohata Kotomi is living in the room #1. She is a best friend of Kozue. Then, the resident of the room #3 is Momono Megumi. She is a kind of person who goes her own way. In the room #5, Kurosaki Sayoko and her daughter Asami are living. Asami is in the first grade of a junior high. Finally, in the room #6, Haibara Yukio is living with his puppet, “Johnny”. They are all characteristic and eccentric persons. However, in fact, the most eccentric person is Kozue. She has a secret; when she is shocked at something, she changes her personality. Not knowing this, Shiratori moves to Narutaki-So to realize his dream. What kind of a new life will be waiting for him?

A life description about the mangaka Aito Yuuki and his assistant Ashisu Sahoto. Aito doesn't understand the feelings of the characters on his stories. So he asks Ashisu to help him. Ashisu would do everything for the work. She would even let him touch her breast so he will know how it feels like?! The Habit?! The Pervert?! Can we understand them? That's the comedy of a mangaka life.

Tanaka Manabu is a geeky student, on the way to school he meets a girl carrying a bloody bat. That girl is Ryuuzaki Reina, leader of the school's female delinquents. It's love at first sight. A gag manga (with a combination of 4koma and normal page) about having a yandere girlfriend. *Note: This is the PUBLISHED version of Yandere Kanojo. The two versions were published simultaneously and were collected in the same tankoubons. They also often reference events from the other.*

Taking place after the events of Darker than Black and replacing the events Ryūsei no Gemini completely, Hei (BK201) and Yin return to Tokyo to investigate how a Black Dandelion is granting Contractor-like powers to people who come in contact with it.

Continues the story from Superior, about a hero who's aim is to defeat the demon queen while being accompanied by the demon queen herself...

Tomari, a low-level administration worker in Hell, has suddenly been appointed to Enma Hall to be the aide to the King of Hell himself. There, she finds that she will have her hands full, and the King of Hell will keep her real busy, but not in the manner that she initially thought... What's worse, she didn't know what she literally signed up for, courtesy of the King. A contract love comedy unfolds!

After being accepted by the Melite Conservatory of Music, Taki Ren, travels all the way to the City of Music, Vienna, to fulfill her dream of becoming a composer. However, there's one problem: Melite is an all-boy's school! Her classmates are all musical geniuses, but they also come with problems! *Includes Chapter 0 and 2 bonus chapters.*

Hayate Sakura, a normal high school student. Everything about him is normal except one thing: ghosts are attracted to him. One day, someone saved him from all the ghosts he had attracted. His so-called hero introduced himself as Undertaker Riddle who sends spirits to peace. Sakura then asked him a favor if he could help him get rid of the ghosts, and in exchange he'll do anything. Undertaker Riddle then offered Sakura to work for him as an Undertaker too. Will he take the job and get rid of the ghosts, or decline the job and have the ghosts in his tail for the rest of his life??

Girls are creatures that are full of mysteries. In a dilapidated dormitory for girls, Yachiko who has run away from home meets Giko, the crevice ghost. Peeping on and observing girls, that is Giko's goal, all to unravel the mysteries that is a girl and to note them in his "Girls Dictionary?!"

Normal high school girl Irie Yuunagi suddenly has her blood sucked by a strange man one night. Yuunagi wakes up as a vampire and learns that she has been added to the man who bit her, Rin's, family. She begins to learn about the rules of the vampire world from Rin.

"Inoue-san, you're my first boyfriend...", says Yamamoto, 28 years old. "I don't have a lot of experience either, but we'll work through it together", says Inoue, 32 years old. In reality, Inoue's never been with a girl either, but he couldn't tell Yamamoto that. A fluffy love-comedy about the adventures of this innocent and pure couple. *Note: Includes 3 extra chapters.*

At Takamanohara School, lots of the students have crushes, but all on different people. In fact, if you trace out who likes who, it makes a full circle! This is the story of that circle of crushes.