Based upon the reviews and the ongoing comments section, I hold a very unpopular opinion. I did not like Yumi's Cells Season 1. I had very high hopes, wholly and solely for the cast. I hadn't read the manwha and my adhd brain doesn't do well with the mixed mediums of anime and reality, but that cast! *chefs kiss*. I came in with fully open eyes and no specific expectations, but I was rapidly dis-engaged.

My first point of question - am I watching the same characters as everybody else?! [If anyone here has watched "Sex Education", a show made in Britain, streamed on Netflix. I feel like I had the same disconnect with other viewers watching it, as I have had here. At the end of Season 3, everyone seemed to be angry with Otis (the main lead) for dumping Ruby - where-as I found Ruby to be a horrible person, terrible for Otis' self-esteem and personal identity... but I digress]
I don't understand why anyone would want Yumi and Woong to stay together! We as the omniscient audience, are privy to Woong's thoughts, as he deals with both Yumi and his female workmate, Sae Yi. It is very clear that he was lying to Yumi from the outset, and also that he is keeping Sae-Yi on a string, by avoiding being direct with her. Maybe you consider them white lies to, in Woogi's opinion, spare people's feelings. I see them as lies, to spare his own feelings of vulnerability or discomfort, to manipulate other people's behaviour and opinions. He consistently states that he likes to be straightforward and honest, but he fails to actually be so (he doth protest too much!). He is the epitome of the "I am a good guy" manipulator - he believes he's a good guy, and wants everyone else to believe it, but his actions are not those of a good person. Maybe I have PTSD in this regard, but this kind of person is the WORST to me! Props to the writer for characterising him so well, and props to Ahn Bo Hyun, for portraying it so convincingly, but that, was my first cause for pause. My heart, being ABH shaped, I was relieved to read that he, at least (unlike the seeming majority of the audience), was very aware that Woong is problematic.
Ahn Bo Hyun revealed that his resemblance with Goo
Woong in this area is “close to zero.” “Unlike Goo
Woong, I don’t do things that could cause someone to
become angry or to misunderstand,” he said. “I know all too well that it won’t do me any good.” (Soompi Nov 7 2021)

Now to my second stick in the throat: It comes very early in the series; Yumi's dealings with her workmate, Chae Ugi. He thinks they're close friends. Yumi has a crush on him, but sadly it is amplified, by her need to one-up another workmate Ruby. In this whole game, Ugi is a victim - he bares his truth (it's strongly insinuated he is gay, without overtly stating it) to Yumi, and she promptly excuses herself from the conversation, to go have a sook/cry/wallow, with no thought whatsoever for Chae Ugi's very difficult situation.
In a country that continues to have no functioning anti-discrimination legislation, (https:///news/2021/11/11/national-assembly-south-korea-should-act-swiftly-enact-anti-discrimination) admitting, at work, that you are gay, is exposing yourself to not only public shaming and the vitriol of netizens, but also being sacked from your job (in one of the most difficult job markets in the world) with absolutely no recourse. Yumi is supposed to be a woman in her late 20s, but her behaviour is this scene is very teen-brain. *"OH woe is me, he doesn't like me!"* Boo!. Hoo! He just fully exposed himself and his life to you, and you promptly excused yourself. What the, what!?!

So all of that would've been ok for me to swallow if I could see the possibility of growth. But when I posted my concerns in this forum, I was battered down, told I was wrong, and given multiple re-tellings of ALL of Yumi's feelings (as if they're not right there, perfectly illustrated and animated as Yumi's Cells FFS!) as if they were a justification for her questionable behaviour.
At this point, I just lost hope, that it was a story I could engage with, seeing as I definitely couldn't engage with the audience. So I dropped.

I may watch season 2, in the expectation that Yumi has evolved a bit as a person. And without concern that she is compromising herself, with an "I'm a good guy!" liar Woong. I don't care how you justify or rationalise it, he is NOT a good guy, he's a lying LIAR!

Just to clarify, my music rating is a pass, and no more because I cannot recall any of it. This means it wasn't intrusive enough to be annoying (fail) nor great enough to be memorable. All other ratings are reflected in my opinions above.

Addendum Oct 2022...I just found my notes/musings, whilst I was watching the epsiodes during airing, so I'm posting them now:
There are disturbing examples of inherent misogyny (misogynistic inherent bias) as well as toxic masculinity, in the cells of Yumi's Cells
This show has started to go south for me, at the appearance of a cell called Hysterius.
Hysterius dwells in the unconscious and brews poisons... hysteria means of the womb, ergo if you have a womb, you will naturally be brewing poison somewhere in the deep dark recesses of your unconscious. Ergo ALL WOMEN ARE TOXIC!Hysteria is a hugely problematic word; originally used to describe mental illness specificlly in women.
[Coined by the likes of Freud, who it turns out, was treating a whole bunch of young women who were victims of incest, but their father's and brothers were fine, and those girls just had penis envy!]
Much like 'lunatic' (mental illness due to the full moon), it's not a term in current use unless you intend to be extremely misogynistic and derogatory.

Yumi responds like a spoiled child, completely lacking in sensitivity or compassion, when her crush confides in her that he is gay (she walks out with little explanation to wallow in self-pity in the bathroom)

Naughtysarus vs naughty cell: seriously?! A man's sex drive is represented by an out of control monster, whilst a woman's sex drive is represented by a small mildly cheeky, tree rutting MALE cell in tighty-whiteys!?!? In other words a woman doesn't actually have HER own innate sex-drive because it's a masculine trait. How did we ever populate the planet?! Oh that's right, RAPE. The out of control monster just has his way with her.

Woo Gi's female friend Sae-Yi tells him all women of a certain age are only interested in marriage. This ties in with SK's ever repeated mantra - men and women can't be friends. Why not? Because only sex exists between men and women. No other relationship is possible? Or as 'naughtysaurus' suggests; confronted with an 'attractive' woman in any situation, a man will lose his self control? Or men and women have nothing in common that would actually allow friendship, because of the ROLES we are required to play. Confucius was a fracking Narcissist! (So is my mother)

The character Sae-yi is an anti-feminist character and a stereotype that is common in Hollywood as well. I call this stereotype "The Ally". Undermining other women with her generalisations (about all women Yumi's age wanting to marry...all women but not me. I'm not like other women...is implied). She competes for control of Woo Gi, despite not wanting to date him (that men, in this instance, are commoddities; to be owned and controlled; is implied). And her and Yumi can't be friends either, but rather, competitors for Woo Gi. If you were his real friend you wouldn't reveal to his girlfriend that you chose her gift, not him.
IMO Woo Gi is a bad guy, the stereotypical "I'm a good guy!" Wolf in sheep's clothing. He tells Yumi, from their first date and then repetitively "I don't lie", when we can see from his cells that he is constantly lying by omission. But based upon audience response and comments, that's ok!? He's just a poor communicator, trying to protect Yumi's feelings! GAAAAAAHHH it makes my skin crawl to think that people find this endearing and ship their love!
Woo Gi is also very aware that Sae-Yi is problematic. He controls the information he gives to both her and Yumi. The dinner where he avoids Sae-Yi's advances rather than, I don't know, being direct and telling Sae-Yi how much he likes Yumi. Honestly to me it looks like he's keeping Sae-Yi on a line, in case things go south with Yumi

A cell called "Sensitivity,"?! I want to know the direct translation of this cell, because the cell's behaviour does not match the actual meaning of sensitivity. Maybe Hyper-sensitivity, Insensitivity or Reactivity would have been less ambiguous, but I guess this would have made Yumi's immaturity much more obvious to an audience that clearly doesn't want to relate to her as such. Yumi does not display any sensitivity, but rather self-absorption. I think the audience is relating to it as VULNERABILITY, which is much more palatable than IMMATURITY.