Yumi's Cells is a South Korean webtoon created by Donggeon Lee. It follows the life of a young woman named Yumi and her emotional and cognitive experiences, represented by small characters called "cells." Each cell embodies different feelings and thoughts, influencing Yumi's decisions and actions throughout her daily life. The webtoon explores themes of love, work, and personal growth, showcasing how Yumi navigates relationships and challenges. It has gained popularity for its relatable storytelling and unique visual style, leading to adaptations in both animation and live-action formats, further expanding its audience.