High-schooler Takayuki is considered a cool elite; all his peers are sure his thoughts are about nothing but serious, important subjects. However, they're mostly just wild fantasies about his childhood friend, the cute but simple Ken. Using all his cunning and wiles, Takayuki's determined to win over Ken.

manga sequel to K project movie, Missing Kings.

From AQUA Scans:

Tokyo Regional Legal Affairs Bureau Census Division, Annex 4, also known as SCEPTER 4, is a police institution that aims to stop criminals with special skills. But their real target is...?

The story of the Green Clan, "Jungle," starring antagonists of K anime series 2, K: Return of Kings.

This is the story of how Yata Misaki and Fushimi Saruhiko met, became fast friends, and, eventually, parted ways.

Set in a world where history has taken a slightly different course from the one we're familiar with. In Shizume City there is a psychic war between seven kings. The story goes that the Third King, known as the Red King, created a group called HOMRA filled with extraordinary people. If you manage to join HOMRA, you also acquire unbelievable psychic abilities.

In modern Japan there are seven "Kings" who share power with their fellow clansmen. The Blue King Reishi Munakata, the leader of the Blue Clan "Scepter 4," held great responsibilities on his back. The tower that Gold King Daikaku Kokujōji supervised called the "Dresden Slate" was still on his mind, and he felt a great burden by killing the previous Red King, Mikoto Suoh. On the other hand, the former Red Clan "HOMRA" clansman Anna Kushina experienced the attacks from the Green Clan "Jungle" and awakened as the next Red King. By doing this, she bound her comrades through a strong bond once again. Finally, White Clan members Neko and Kuroh believe that the White King Yashiro is still alive, and seek his whereabouts. However, it was not just them searching for the White King. With "Jungle" once again jumping back into action, the fates of the various Kings are brought together.
from ANN

From September Scanlations:

Yatogami Kuroh has lost the only thing remotely close to family he had left—and to make matters worse, he’s been charged with a final task by his master that he isn’t entirely sure he’ll be able to fulfill. Follow this young modern-era samurai as he sets off on a quest to track down the next Colorless King and determine if he’s evil or not…and to strike him down where he stands if he is. (Off-shoot manga of the anime ‘K Project’)

The story takes place in a world where seven people with unusual powers are crowned as "kings," and revolves around the "bonds" and "fate" between the people involved.

The beginning of a love story set in a school for eccentric artists. Kei Onodera, a college student majoring in science starts working part-time as a lecturer at an art prep school. Immediately, he catches the eye of the rough and wild sculpture teacher, Higa Rikimaru!!

Funeral bells are ringing the day Mikaya moves into a new apartment. Once he arrives, he learns a startling fact; his flat was previously occupied by the dead man, K. Strangely enough, no one ever found K's body...yet all the people who lived in the same apartment complex as him are absolutely convinced of his death. Where is the body, and could it be one of his eccentric neighbours who was responsible for K's death and subsequent disappearance?

Employee Kim Doyoon has been working for 5 years. He has one secret that he can't tell anyone else - the fact that he's a half-vampire born between a human and a vampire. One day, a single mistake turns his whole life upside down.

When K-books turned 15 years old in 2008, a collection consisting of artbooks, special phone cards and many other products was released, to thank its customers. Please read the below notes carefully for the contents of EACH volume.Note #1: This collection comprises of 2 separate artbooks as in, 1 for the boys and 1 for the girls. The particular names are Boys side and Girls Side and neither of the 2 are likely complete. Note #2: Boys' side = often ecchi and with some images featuring some nudity. One of the images was lolicon, soo I left it out in accordance with Batoto's site policy. I mean: you don't want me to start censoring by drawing on someone's art, right? The image in question was by Kiyotaka Haimura, if anyone's extremely curious. Girls' side = mostly shounen-ai but some of the images are not. Nothing that really qualifies as "mature" for this artbook.

When their high school’s pop-music club is about to be disbanded due to lack of interest, four girls step up to fill the membership quota. Unfortunately, lead guitarist Yui Hirasawa has never played an instrument in her life. Ever. And although she likes the idea of being in a band, standing in front of the mirror posing with her guitar is a lot easier than actually playing it. It’s gonna be a while before this motley crew is rocking out, but with their spunk and determination cranked to 11, anything is possible!

Interpretations of Kakifly's K-ON! 4koma by various other mangaka.

Sakuma Yukari decided to start a band on her own after seeing a certain band during the Sakura High School festival, then with her best friend Shimizu Kaede, they want to join the Light Music Club only to discover that in their school there isn't a club like that. With help from Sawabe Maho, they discover there is a Light Music Appreciation Society with only one member, Satou Riko.

A spin-off of the original K-ON! manga, this series is about the daily lives of the girls and their daily shenanigans.

Popular erotica writer Kaji "K" sensei's glamorous appearance is only rivaled by the fantastic rumors surrounding him. Like how one of his best selling novels was based on a relationship with a high-school student... or how two of his model sex friends got into a cat-fight in the middle of a highway... or how he has threesomes during his nocturnal writing sessions! At least these are the things that go through editor Kobayakawa's head when he sees his celebrity charge, that and the one where K sensei sent three editors to the hospital?! Yet, while taking photos for a magazine interview and watching K sensei work with such professional focus Kobayakawa realizes that the outrageous rumors may be just that. That is until Kaji pushes him down on the sofa to "reward" him. Thus begins the hunt of the herbivore editor and his carnivore author.

In the K-Sensei series:

V.1 - K-sensei no Yajuu na Aijou
V.2 - K-sensei no Yaban na Renai
V.3 - K-Sensei no Furachi na Junai
V.4 - K-Sensei no Himitsu no Netsujou
V.5 -

When magic and wizards are involved in crimes, only another wizard can track them. Join Karol Kings, The Wizard, as he, Sherlock Holmes and Jack the Ripper shape London's history in different ways.

This manga deals with the history of a teenager, Tobi Shima Sen, who lost his father and lives with his mother. He is a scrapper but his mother has no authority over him. In order to educate him, she decides to send him to a kickboxing coach during the holidays/vacation.