3.5 billion webtoon views later, Yumi's Cells turns 5

Five years ago this month, a Seoul office worker named Kim Yumi walked onto Korean television with a village of cartoon brain cells narrating her love life. The show is still running, and the webtoon behind it has now been read 3.5 billion times.source

Yumi's Cells at 5: What the 3.5 Billion Views Actually Cover

Yumi's Cells (유미의 세포들) is a Korean romance series that renders its heroine's inner life as a village of personified brain cells, and it premiered on tvN and TVING on 17 September 2021 , making 17 September 2026 its fifth anniversary. The 3.5 billion figure now attached to the franchise belongs to the source webtoon, not the drama: Korean coverage in April 2026 put cumulative global webtoon views at 3.5 billion , up from the roughly 3.2 billion reported when the series ended in 2020.source

Quick Answer: Yumi's Cells premiered on tvN and TVING on 17 September 2021, so it turns five in September 2026. The 3.5 billion views belong to Lee Dong-geun's Naver Webtoon — 512 chapters published between April 2015 and November 2020 — not to the live-action drama itself.source

The webtoon ran on Naver from 1 April 2015 to November 2020 across 512 chapters, later collected into 13 print volumes . When Naver announced the finale — a chapter simply titled 'Ending' — it reported about 3.2 billion cumulative views and roughly 5 million reader comments over the five-and-a-half-year run . That same 3.2 billion number was still being quoted in drama launch coverage a year later , which is why the gap matters: the extra 300 million views accumulated after the story finished, largely through overseas-language editions that kept finding new readers.source

The drama's own hook was structural rather than promotional. Yonhap described it at launch as the first South Korean television series to combine live action with animation , a framing Studio N and CJ ENM have used for the franchise ever since . Kim Go-eun plays Yumi, a 32-year-old office worker; everything happening inside her head is handed to an animated ensemble — Love Cell, Hunger Cell, Rational Cell and the rest — who argue, campaign and occasionally sabotage her decisions on screen.

How Each Season Changed the Story, From 2021 to 2026

The three seasons of Yumi's Cells track one character across three different life stages, and each season changed both the romance and the format. Season 1 ran 17 September to 30 October 2021 across 14 episodes on TVING and tvN, Friday and Saturday at 22:50 KST, and averaged a 2.230% Nielsen Korea nationwide rating . Season 2 followed on TVING from 10 June 2022, and Season 3 closed the arc on 4 May 2026 — 36 episodes in total spanning four and a half years .source

Season 1 is the workplace-and-dating season. Kim Yumi is with Goo Woong (Ahn Bo-hyun), a game-company founder, while Yoo Babi (Park Jin-young) enters as the colleague who reads her more accurately than her boyfriend does . It was also the season with the widest immediate reach: ahead of the premiere, TVING said broadcast rights had already sold into more than 160 countries across Europe, North America and Southeast Asia .

Season 2, 14 episodes released on TVING from 10 June to 22 July 2022 with a later tvN broadcast window of 16 November to 29 December 2022, moves Yumi into a relationship with Babi while the cells argue over a more adult romance and her writing ambitions . Its linear rating dropped to a 1.204% average, but it recorded the highest opening-week paid-subscriber contribution of any TVING original drama to that point — roughly four times Season 1's debut . That gap between broadcast numbers and subscription numbers is the clearest signal of where the franchise's audience actually moved.source

Season 3 premiered on TVING on 13 April 2026, two episodes each Monday at 18:00 KST alongside a tvN Monday–Tuesday 20:50 slot, and ended on 4 May 2026 after 8 episodes . Yumi is now a best-selling author, paired with her editor Shin Soon-rok (Kim Jae-won) . It opened at a 2.3% rating and averaged 2.139%, recovering Season 1's level .source

The format change drew the loudest complaint. Eight episodes gave Season 3 roughly half the runway of the earlier seasons, and the confession-to-marriage arc was compressed into the final two episodes — a pacing decision viewers contrasted directly with the 14-episode structure they had watched twice before. Kim Go-eun, returning to the role after four years, framed the run differently: the series, she said, had "opened the second chapter of my acting career" .

Beyond the Drama: The Movie, the Musical and a Braille Comic

Outside the TVING and tvN seasons, Yumi's Cells has been rebuilt four times in four different formats: an animated feature, a stage musical, a tactile braille comic and a government public-awareness activation. The pattern matters more than any single result. Each version re-cut the same premise — a woman's inner life staged as a village of personified brain cells — for an audience that consumes stories differently, and only one of them was a straightforward commercial success.

Yumi's Cells: The Movie opened in South Korean cinemas on 3 April 2024, a 93-minute animated feature directed by Kim Da-hui and co-produced by Studio N and Locus Corporation . The theatrical run was modest: the Korean Film Council database logs 441 screens, 76,596 admissions and US$447,884 in gross receipts as of 16 September 2026 . Critical recognition ran ahead of the box office — the film picked up a Korea Content Awards Presidential Award for animation, a Daejeon Special FX Festival Special Jury Award, and a WAF Best Art Direction award for Lee Suk-ki . It moved to streaming on Rakuten Viki on 19 July 2024, which is where most international viewers have seen it .source

The musical, produced by Sam Company with Studio N, ran 30 June – 23 August 2026 at the Seoul Arts Center's CJ Towol Theatre, a 1,004-seat house, with a 160-minute running time including a 20-minute intermission and admission from elementary-school age . Tiffany Young and Kim Ye-won alternated as Yumi, Kim So-hyang and Yuria shared the Love Cell, and Choi Jae-rim and Jung Taek-woon played "Cell 109" — a character invented for the stage to restructure the narrative for audiences who had never read the webtoon. Yang Jung-woong directed, Kim Sung-soo handled music direction and Kim Ga-ram wrote the book . Seoul Arts Center listed OP and R seats at 160,000 won, S at 120,000 won and A at 80,000 won .source

The least commercial adaptation may be the most telling. On 31 October 2024, WEBTOON Entertainment announced that Yumi's Cells and Hooky would be the first series released as tactile digital comics on Dot Inc.'s Dot Pad, a refreshable tactile-graphic and multi-line braille display with 320 braille cells, distributed globally on the device . A comic built entirely on visual metaphor became a format problem worth solving.source

Public-sector use followed. The Ministry of Culture, Sports and Tourism licensed the IP for "Save Us! Carbon-Zero Influence Cell Village," an escape-room-style experience at Hongdae Star Square in Mapo-gu, Seoul, running 22–30 August 2026 from 15:00 to 21:00 daily with first-come merchandise giveaways . A Season 3 pop-up had already run 12–24 May 2026 at the Hyundai Outlet Dongdaemun B1 Everline Store in Jung-gu on a "Cell Village" concept. Both have closed — check current listings before planning a visit.

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Where to Actually Watch Yumi's Cells Right Now

Yumi's Cells is available legally in most major markets through three services: TVING in Korea, HBO Max and Disney+ across the Asia-Pacific, and Rakuten Viki almost everywhere else. TVING opened a dedicated Yumi's Cells hub on 23 March 2026 carrying Seasons 1 and 2 alongside short-form and cast clips, ahead of the Season 3 premiere on 13 April . That hub is the single place where all 36 episodes sit together.

Domestically, the drama also runs on tvN's linear schedule, the channel that carried Season 1 from 17 September to 30 October 2021 in a Friday–Saturday 22:50 KST slot and Season 3 in a Monday–Tuesday 20:50 window . Reruns rotate through that schedule rather than sitting at a fixed time, so the TVING hub is the more reliable route if you want a specific episode on demand.source

For viewers in the Asia-Pacific, Season 3 launched through the TVING Collection simultaneously on HBO Max across 17 markets and on Disney+ in Japan, where it reached a Top 3 chart placing . Outside Asia, Rakuten Viki is the main carrier: Season 3 topped its weekly charts in 81 countries on release, including the United States, Brazil, France and the UAE . Viki also picked up the 2024 animated feature on 19 July 2024 .

The reason coverage is this wide comes down to a deal signed before anyone knew the show would work. TVING said ahead of the 2021 premiere that broadcast rights had already sold into more than 160 countries across Europe, North America and Southeast Asia . Five years on, that footprint is why most fans abroad have a licensed option rather than a region-lock problem — worth checking your local service before assuming otherwise, since catalogue rights rotate and Season 3's availability outside the TVING Collection partners is the narrowest of the three.

Practical note for readers reading in order: the seasons are not interchangeable entry points. Starting on Season 3 without Seasons 1 and 2 leaves the Woong and Babi arcs unexplained, and the TVING hub's short-form clips are recaps rather than substitutes.

Is a Season 4 Coming — And What's Next for the IP?

No Season 4 of Yumi's Cells has been announced by TVING, CJ ENM or Studio N as of September 18, 2026. Season 3 closed on 4 May 2026 after 8 episodes , and the franchise has no confirmed next installment in production. What exists instead is a commercial case for one: Season 3 ranked No. 1 in TVING paid-subscriber contribution on release and held that position for three consecutive weeks, topped its tvN time slot, and led Rakuten Viki weekly charts in 81 countries including the United States, Brazil, France and the UAE .

The fifth anniversary itself passed without a primary campaign page. Neither TVING, CJ ENM nor Studio N published a statement dated 17 September 2026 marking five years since the premiere; the clearest public marker on the date is a Soompi piece tied to Rakuten Viki . For a franchise that ran a musical at the Seoul Arts Center and a government campaign in the same calendar year, the silence on the anniversary date is a fair signal that the rights holders are not currently sitting on an announcement.

Two creator-side facts shape what a fourth season would even adapt. The webtoon finished in November 2020 at 512 chapters , so the three seasons have already worked through the published source. Author Lee Dong-geun returned in July 2021 with a different title, Jojo Comics, and has not come back to the Yumi universe as a creator . Any Season 4 would therefore be original material rather than an adaptation — a different production risk than Seasons 1 through 3 carried.

On the casting side, the lead has not shut the door. Kim Go-eun, returning to the role after four years away, said the series had "opened the second chapter of my acting career" .

The concrete takeaway for fans: treat the 36 episodes aired between 17 September 2021 and 4 May 2026 as the complete televised story , watch TVING's official channels rather than aggregator rumours for any Season 4 news, and expect the next movement from this IP to come from offline and licensing formats — pop-ups, stage runs, accessibility editions — which have shipped consistently while the drama has not.

Frequently asked questions

When did Yumi's Cells first premiere?

Yumi's Cells premiered on 17 September 2021, released simultaneously on the streaming service TVING and the cable channel tvN, which makes 17 September 2026 the series' fifth anniversary . Season 1 ran 14 hour-long episodes through 30 October 2021, airing Fridays and Saturdays at 22:50 KST, with Lee Sang-yeop directing and Kim Go-eun in the title role . Yonhap described it at launch as the first South Korean television series to combine live action with animation .

How many views does the Yumi's Cells webtoon have?

Lee Dong-geun's Naver Webtoon had roughly 3.2 billion cumulative views when it ended in November 2020, alongside about 5 million reader comments over its five-and-a-half-year run . Korean coverage in April 2026 put the global cumulative figure at approximately 3.5 billion views, the increase reflecting overseas-language editions added after the series completed . The webtoon ran from 1 April 2015 to November 2020 across 512 chapters, collected into 13 print volumes .

Where can I watch all three seasons of Yumi's Cells outside Korea?

Outside Korea, the main routes are Rakuten Viki, HBO Max and Disney+, depending on your region. Season 3 topped Rakuten Viki's weekly charts across 81 countries including the United States, Brazil, France and the UAE . CJ ENM says the season launched through the TVING Collection simultaneously on HBO Max across 17 Asia-Pacific markets and on Disney+ in Japan, where it placed in the Top 3 . Domestic viewers use TVING's own Yumi's Cells hub, opened 23 March 2026, which carries Seasons 1 and 2 plus short-form and cast clips . Catalogue availability varies by territory, so check your local service before subscribing.

Is there a Yumi's Cells Season 4?

There is no official Season 4 announcement. Season 3 premiered on TVING on 13 April 2026 and concluded on 4 May 2026 after 8 episodes, bringing the drama to 36 episodes in total across three seasons . Neither TVING nor Studio N has confirmed a renewal as of 18 September 2026 . Season 3 performed well commercially — No. 1 in TVING paid-subscriber contribution for three consecutive weeks and a 2.3% premiere rating on tvN — but the 8-episode order, down from 14 in the earlier seasons, drew viewer criticism for compressing the confession-to-marriage arc into the final two episodes .

Can I still see the Yumi's Cells musical or pop-up events?

No — both runs have closed. The musical adaptation, produced by Sam Company with Studio N, ran 30 June to 23 August 2026 at the Seoul Arts Center's CJ Towol Theatre, a 1,004-seat house, with a 160-minute running time including a 20-minute intermission and tickets priced at 160,000 won for OP/R seats, 120,000 won for S and 80,000 won for A . The Season 3 pop-up at the Hyundai Outlet Dongdaemun in Jung-gu ran 12–24 May 2026, and the Ministry of Culture, Sports and Tourism's carbon-zero experience at Hongdae Star Square in Mapo-gu ran 22–30 August 2026, 15:00–21:00 daily . Offline activations have appeared roughly annually since 2024, so TVING's hub and Studio N's works page are the places to check for the next one.

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This article was written using information collected and analyzed by NAMANE's in-house K-pop research AI engine. We use AI technology to bring you faster, broader coverage, and in the process some details may occasionally differ from the latest facts. For important information such as dates, venues, and prices, please double-check with official sources.