Yumi's Cells (webtoon).

유미의 세포들

Yumi's Cells (Korean: 유미의 세포들) is a South Korean manhwa series written and illustrated by Lee Dong-gun. This webtoon was released on internet portal Naver from April 1, 2015, to November 13, 2020, with a total 512 chapters. The story revolves around Kim Yumi, a 32-year-old office worker, and her brain cells, tiny blue-hooded cells that control her every mood, thought, and action.