Sendo Kazuki, failed the entrance exam for the art college he was applying to, His childhood friend, Kuhonbutsu Taishi forced Kazuki to enter the doujin (private publishing) world.

Unaired episode 11.5 included with the second Blu-ray/DVD volume.

Yeo Eui Joon, who works at a convenience store frequented by gangsters, wants to quit as soon as possible because of the dangerous work environment. However, he's stopped by the pay that's 1.2x more than other stores! So, Eui Joon, who needs every penny he can get, overlooks the danger and continues working there. Then one day, Bum Geon Woo, who looks more like a gangster than any other gangsters show up. And as soon as he appears, the other gangsters simmer down... Will Eui Joon be able to safely continue working at this convenience store?

A mysterious cell wearing a stylish hat appears before the regular cells, who are bored with just the same (cell division) work over and over again, every day. This mysterious cell lures the regular cells into a mischievous scheme against White Blood Cell and Killer T Cell. The regular cells enjoy working out their everyday, pent-up frustration. But, just who exactly is this cell wearing a stylish hat?