The worst episodes of Yumi's Cells

Ranked by viewer rating, lows first. Lit marks on the season rail place this list across the run. Vote on a placement to back it or contest it.

  1. 01

    S01E02 · September 18, 2021 · 1h 2m

    Episode 27.3

    Yumi gets to go to the flower festival with Woo Gi, alone! However, Ruby keeps following them and disrupts the date of her dreams before it even begins. The ultimate chase between Yumi and Ruby begins. Meanwhile, Woo Gi makes up his mind to ask Yumi the question that has been on his mind.

  2. 02

    S01E03 · September 24, 2021 · 1h 9m

    Episode 37.3

    Although his first impression was a total bust, Gu Woong turns out to be more decent than Yumi thought. Yumi's heart seemed to be opening up to the easygoing and honest Woong... But why doesn't he reply? Yumi's mind is coming to all sorts of weird conclusions to understand why Woong didn't reply!

  3. 03

    S01E01 · September 17, 2021 · 1h 1m

    Episode 17.5

    Cells live inside Yumi's head, a 32 year-old who works at Daehan Noodles' finance department. In her dull life where her main concerns are what to eat or wear, only one thing excites Yumi and her cells — Woo Gi from Sales! He's handsome, gentlemanly, and 5 years younger... Age doesn't matter if he's just a crush, right? Or she thought, but Woo Gi keeps hanging around her. Is this a green light?

  4. 04

    S03E07 · May 4, 2026 · 1h 13m

    Episode 78.0

    A sudden confession leaves Yu-mi shocked, prompting her ‘Cell Village’ to activate its defenses as she suppresses her feelings.

  5. 05

    S01E04 · September 25, 2021 · 1h 2m

    Episode 48.3

    Woong ran in the rain to bring Yumi to the hospital. Finally, the door to Yumi's heart that was shut tightly opens up again... Meanwhile, Woong's female friend Sae-yi starts developing weird feelings when Woong starts dating.

  6. 06

    S01E09 · October 15, 2021 · 1h 2m

    Episode 99.0

    Yumi finally explodes in anger when Sae-yi moves houses. The breakup alarm gets activated in Yumi's cell village. They risk breaking up if Woong doesn't contact her in 24 hours. While the couple goes through a cold war, Sae-yi takes this opportunity to get between them.

  7. 07

    S01E10 · October 16, 2021 · 1h 1m

    Episode 109.0

    Yumi's Love cell is good at everything, but she has one weakness. Thus, the cells suggest that Ruby becomes her private tutor to help Love Cell! Meanwhile, Ba-bi who has been paying attention to Yumi's social media posts, gives Yumi an unexpected suggestion, making her heart race.

  8. 08

    S01E11 · October 22, 2021 · 1h 7m

    Episode 119.0

    As the two of them start living together suddenly, they learn about the sides of each other that they never knew existed. Both Yumi and her cells grow to like Woong even more. If Woong feels the same too, perhaps they can...

  9. 09

    S02E01 · June 10, 2022 · 1h 3m

    Episode 19.0

    After breaking up with Woong, Yumi and her cells are struggling to keep her life together. Although she acts as if nothing happened, Yu-mi is suffering from post-breakup syndrome and Ba-bi comforts her. In no time, a Yoo Ba-bi club has formed in the cell village without Yu-mi realizing...

  10. 10

    S02E02 · June 10, 2022 · 1h 2m

    Episode 29.0

    Although Yu-mi was taken aback by Ba-bi's sudden confession, her confidence level shoots up. Yu-mi becomes more preoccupied by Ba-bi and she unconsciously finds herself getting heated up when Ruby sets up a date for Ba-bi.

  11. 11

    S02E12 · July 15, 2022 · 1h 8m

    Episode 129.0

    As the war of nerves between Woong and Ba-bi rages on, Yu-mi is put in a tight spot by the unexpected three-way encounter... Meanwhile, Yu-mi finds out that Ba-bi is going to America for a business trip while planning for his birthday. With everything happening at bad timing, will getting back together with her ex be that hard?

  12. 12

    S03E08 · May 4, 2026 · 1h 18m

    Episode 89.0

    Yu-mi is pleasantly surprised by her new relationship and she gains a new perspective on love.

  13. 13

    S01E05 · October 1, 2021 · 1h 7m

    Episode 510.0

    Sae-yi, the friend that Woong often mentioned, turned out to be a woman! "Can men and women be platonic friends?" The cells break into a heated discussion. On Yumi's birthday, Yumi visits Woong's game studio and finally comes face-to-face with Sae-yi at an unexpected place.

  14. 14

    S01E06 · October 2, 2021 · 1h 11m

    Episode 610.0

    Having only dreamt of it, Woong finally visits Yumi's house. That night, Yumi and Woong spent an unimaginable night together. At Woong's suggestion, the two of them decide to go on a trip. Yumi's heart races at the thought of a hotel stay with an ocean view, even though her Travel cell is dead. Also Naughty Cell's heart is racing, too...

  15. 15

    S01E07 · October 8, 2021 · 1h 7m

    Episode 710.0

    At a friend's wedding announcement, Yumi mentions that she has a boyfriend. When her friends don't believe her, she proclaims that she will bring Woong to the wedding. But Woong is too busy, she has no choice but to... Just as she was about to give up, another situation crops up where it becomes necessary that Woong attends the wedding.

  16. 16

    S01E08 · October 9, 2021 · 1h 2m

    Episode 810.0

    Rumors about Yumi and Woong's wedding spread like wildfire. However, the two of them have different thoughts about marriage. Meanwhile, someone unexpected appears in front of Yumi as she prepares for a marathon. Who is this guy who found her missing umbrella...?

  17. 17

    S01E12 · October 23, 2021 · 1h 4m

    Episode 1210.0

    After Yumi brought up the topic of marriage, their relationship grows awkward for some reason. Meanwhile, Woong and Ba-bi attend the same dinner party by coincidence, and drunk Woong forgets everything that happened that night. What could have happened the night before? Woong feels anxious all of a sudden...

  18. 18

    S01E13 · October 29, 2021 · 1h 3m

    Episode 1310.0

    Woong breaks Yumi's precious table while changing a light bulb for her. Seeing Woong go to extreme lengths to replace her table, Yumi has mixed emotions... On the wedding day of Woong's friend, Yumi decided to go on a date with Woong after a long time.

  19. 19

    S01E14 · October 30, 2021 · 1h 2m

    Episode 1410.0

    Yumi and Woong decide to take a break. Yumi now has to spend time alone when she used to spend it with Woong, so she seeks advice from Ba-bi... After some time, the two of them meet again at the place they first met. What would Yumi's decision be? And what would Woong's decision be?

  20. 20

    S02E03 · June 17, 2022 · 1h

    Episode 310.0

    News of Ba-bi's date puts Yu-mi in despair. Yu-mi wishes he doesn't go on the date. But she couldn't tell him in the end... On the day of Ba-bi's date, Yu-mi falls asleep after feeling perturbed the entire day, when a message from Ba-bi arrives.

  21. 21

    S02E04 · June 17, 2022 · 1h 7m

    Episode 410.0

    Yu-mi's sweet romance with Ba-bi begins... Her new romance leads her onto a new path. When Yu-mi goes to a book cafe with Ba-bi, she is reminded of her long-lost dream. Although she knows it's too late, someone keeps encouraging Yu-mi to pursue her dream.

  22. 22

    S02E05 · June 24, 2022 · 1h 6m

    Episode 510.0

    Yu-mi and Woong meet again during second-hand market meet up. Unlike Woong who thought it was a fateful meeting, Yu-mi is confused by what Woong said in the past as compared to his current situation. While Yu-mi is trying to enjoy her Christmas with Ba-bi, a message from Woong arrives.

  23. 23

    S02E06 · June 24, 2022 · 1h 5m

    Episode 610.0

    Yu-mi works hard from day-to-day as an aspiring writer. Ba-bi visits her house to cheer her on. While the two of them are enjoying their date, an unexpected visit from Yu-mi's parents catches them by surprise... Yu-mi's father begins to openly keep Ba-bi in check.

  24. 24

    S02E13 · July 22, 2022 · 1h 5m

    Episode 1310.0

    After being proposed to by Ba-bi, Yu-mi goes to meet Ba-bi's father. Yu-mi tries her best to make a good impression on Ba-bi's father, going as far as to summon her full-of-manners self. Meanwhile, Woong hears of Yu-mi's wedding and asks to meet her...

  25. 25

    S02E14 · July 22, 2022 · 1h 4m

    Episode 1410.0

    On the day of the wedding, Yu-mi is unable to meet the deadline. She falls into a panic when she loses her laptop containing the manuscript. At the wedding, all she can think of is running away from reality... At that moment, someone contacts Yu-mi and says that he found her laptop. Who could it be?

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