K' (K-Dash) is a four volume doujinshi compilation released by Kodansha containing oneshots by a number of different authors and artists. The first two issues contained short stories by published mangaka such as CLAMP and Ikumi Mia (amongst others). The first issue was released in December 2002 at Comiket 63, while the second was released in March 2003 to commemorate the opening of the K-Square store. These two issues contained short comedic stories from CLAMP; Tokyo Tower Kankeisha Kakui (characters from Chobits, Rayearth and Cardcaptor Sakura running into each other in the Tokyo Tower) and Murikuri Holic (Watanuki and Yuuko working at the K-Square store while characters from Murikuri look on) The third and fourth issues consisted primarily of work from doujinshi artists.

Hitoshi Kobe is a terrible student and an even worse athlete … though he does have an incredible talent for creating Artificial Intelligence programs. Thirty is his best artificial intelligence program yet – and, more importantly, the only girl who will talk to him. Hitoshi's life is forever changed when a freak accident brings Thirty to life …