The Twelve City, a land governed by the leaders of the families who bear in their names the Chinese zodiac. In a city where youkai and humans coexist, the cat youkai who holds a grudge against the Rat Family appears in front of Nekuni Kyouichi, the head of the Rat Family. It's a malice-covered Hateful cat who is aiming for his life. But that youkai is Nekogasaki Natsuho, who's also extremely anxious around other people... Just like the saying "Curiosity killed the cat" goes, will these feelings also kill the cat?

Accompanied by a talking lantern, Mika pursues her sister on a quest to retrieve that which was stolen from her long ago.

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.

The demon queen subdued enormous and powerful monsters and slaughtered over half of the world's population. Surviving members of the human race elected a hero to slay the demon queen, beseeching release from her oppressive rule. However, he questions his mission to eradicate the monsters in his opinion they too are conscious and alive, and so he anguishes over that fact. Sheila the Demon Queen became interested in him and joined his journey, hiding her identity with the plan to kill him after she has gained his trust. Eventually, she realizes that she fell in love with the hero and hence their journey begins... *Includes chapter 3.5 "Ai no A○ron" (愛のエ○ロン).*

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.*

A prequel to the Saki series, focusing on the childhoods of future professional mahjong players and their peers, among them Shino Shiratsuki, a young girl with an affinity for the 1-sou who is seeking out her missing mother.

After the death of her parents, Kanami Tachibana's once kind older brother suddenly changes for the worse, leaving her to fend for herself. When Makoto Asahi finds her like this, he offers up to become a brother to her. Kanami, feeling the kindness she once felt with her brother and scared to forget her sibling, offers to pay him money for this deed. As their bond strenghtens and Kanami gets to see more of the world than ever, will she get back the kind brother she once loved?

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...

Akira, a second year middle school student, has a normal life on an island of solitude, a serene and peaceful school setting. Akira's daily life is shattered one day by the transfer of a mysterious boy; Matsushiro Nishigami who introduces himself as a shinigami with the phrase "Anyone who gets close to me dies". What could be the meaning of such a bizarre introduction?

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!

The Achiga Girls' Academy in Nara once defeated regional mahjong powerhouse Bansei High School. It advanced into the national team semifinals but lost to the eventual champion, and the mahjong club was later disbanded. Six years later, elementary school student Shizuno Takakamo befriends transfer student Nodoka Haramura. The two eventually enter Achiga Girls', but Nodoka transfers out of the school in the second year. When Shizuno sees Nodoka on television the following year as the national middle school individual mahjong champion, she decides to revive Achiga's mahjong club.