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?

Two side stories: Chapter L (or chapter 25) about Lohmeyer/Romaiya senpai. Chapter F (or chapter 26) about Miwako finding ways to make fun of Yamazaki. (Source: momento)

Ocha-ken is a children's program about tea-dogs and tea-cats, each representing a different blend. The episodes are very short and geared to teaching the audience various values. The lesson, or moral of the episode is displayed at the end.