Yumi's Cells

Yumi, a 32-year-old accountant at Daehan Noodles, leads an uneventful life The only thing that excites her and the cells in her head is the handsome, kind U-gi from Sales Could this be the start of something new?

Yumi finally gets to visit a flower festival alone with U-gi, but Ruby interrupts her dream date Later, U-gi works up the courage to ask Yumi a question he’s been holding back

Despite her terrible first impression of Koo Woong, Yumi slowly falls for his honest charm Just as things seem to be going well, she stops replying to his texts, leaving him baffled as he jumps to a bizarre conclusion

Woong rushes Yumi to the hospital through the pouring rain, and her heart slowly opens up to him Meanwhile, as Woong begins dating, his longtime friend Sae-yi finds herself overwhelmed by unexpected feelings

Yumi is shocked to learn that Woong's longtime friend is a woman, sparking a heated debate among her cells On her birthday, she finally comes face-to-face with Sae-yi at Woong's game studio

Woong spends the night at Yumi's At his suggestion, they head off on a trip together, where their ocean-view stay rekindles Yumi's long-lost love of travel and her Naughty Cell