people's worry about the next arc is not the deviation from slice of life. It's that that the interesting characters that had believable developments are pushed to the back when characters that are one-note, irredeemable, and drag down other characters with them are brought to forefront for the sake of drama.
I fundamentally disagree with two of these claims. I think Mahiru and Kiku were
dislikable characters with depth, and I believe that this arc served a real narrative purpose - it wasn't done "just for drama." Text wall incoming.
IMO, there really isn’t anything mechanically wrong with the arc, at least from a storytelling perspective. The characters, with some exceptions, are well written.
In my assessment, people couldn’t enjoy the story for what it actually
is, because it
isn't what they wanted. So they call it bad. But I don't think it's actually poorly constructed. Take Kiku. Many people saw her as a devil and were upset she didn’t get her comeuppance. But that’s just it - she wasn't
just a devil. She was low empathy, but
she still had her reasons, as all humans should. Monstrous as her actions were, she still had human motivations (love, and ending her long life). You don’t have to like those motivations or like her, but she was a well-executed character concept. She was objectively good character writing – in that she was thought through and felt human. She felt like a
bad human, an uncaring and hypocritical human, but still human. People like her exist: I've met some. I think most people wanted a two dimensional villain, and they wanted the other characters to hate Kiku like they did. But instead they got a monstrous human interacting with other, less monstrous humans. Humans who were willing to put aside their ill feelings towards Kiku out of consideration for Mahiru’s romantic feelings - or at least out of respect for Kou, who wanted to trust in Mahiru. You can say they were wrong to do so, but I'm not sure they really could have done much different.
Mahiru, too, was very human. And I don’t see how he could have ended differently – perhaps, if Kiku had never involved himself with him, he might have survived. But as it was, he didn’t open his heart to anyone. Not even his closest friend, Kou. It was only once he met Kiku that Mahiru began opening up to Kou about his feelings of envy, and the more unsightly things which dragged him down. Mahiru was the kind of depressed person who smiles right up until his suicide - and he did. Kiku accelerated that trend by giving him another thing to lose: first his brother, then his family, and finally Kiku, his lover. He had a rough life. As someone who’s stood on that precipice before, I understand his decision.
Kou and company caught a lot of flak for not intervening, too, and for letting Kiku have her way. But that’s considering Kiku in a vacuum, and it’s denying Mahiru agency. Kou and Akira are Mahiru’s
friends. Friends
trust one another. They wanted Mahiru to be happy, and Mahiru communicated what he wanted very clearly. It wasn’t known whether it would even kill Kiku, let alone Mahiru, and Mahiru reassured his friends that he would see him the next day. They had misgivings, but that was all they had. What were they supposed to do? Pin Mahiru down, throw him in a strait jacket, then kill the woman he loved? Wouldn’t that constitute an enormous breach of trust? Do friends really just disregard the will and agency of each other like that? No, they don’t. Sometimes, when you’re worried about a friend, the only thing you can do is support him, trust him, be there for him, and hope for the best, even if you don’t like the choices he’s made. They travelled to Hokkaido for him. They worked hard to find him. They did their best to talk to him and help him –
as friends. That’s the most they could have done.
This whole arc was a tragedy. And one of the key pieces of tragedy is that it is unavoidable due to the defects of, or constraints on, the characters at play. If Mahiru didn’t make the decisions which led to his fate, he wouldn’t be a depressed, lonely, misunderstood boy, hiding behind a smile. Which he was. If Kiku made any different decisions, she wouldn’t be a person with monstrously low empathy, desperate for death and love in equal measure. Which she was. If Kou and Akira took more forceful measures instead of trusting their friend Mahiru, even in spite of their doubts, then they wouldn’t be Mahiru’s friends. Which they were. Nobody can be anything other than what they are. And sometimes, when people mix together, circumstances produce tragedy.
Then there’s the assertion that the author is tacitly approving of this romance, or that Kiku was somehow "redeemed." It seems like the claim is, because he let it happen, because Kiku was humanized, and because Kiku got away with it, then it’s somehow acceptable. That’s not how it reads to me at all. I don't recall anybody forgiving Kiku - I think the closest we got to that was the detective basically saying she'd let Kiku off the hook (mostly because Kou and company beat her and made her abandon her revenge) which is
very, very different from
forgiving Kiku. Everything Kiku did was self serving and reprehensible, and readers are right to be revolted by her. But sometimes, bad people do get away with it. If we were supposed to think that this was okay, healthy, and romantic, I don’t think the author would have worked so hard to portray it as
literally anything but that. Whatever you want to call this, it’s definitely
not okay. And I think the fact that everyone agrees about that is a strong indicator that the author does too. But the author has no obvious mouthpiece in the story to spell out his feelings to the readers, and I think the readers are also missing how the relationships between characters influenced their decisions and made this outcome inevitable. Maybe that sounds pompous to you, but I really don't feel any sense of superiority here - how am I suppose to disagree without explaining why I think someone is wrong? That doesn't make me feel like more of a "true fan."
So, in a large part, I don't think the hate is founded on bad writing, but how this totally adequate and even
good writing was interpreted by the audience. It’s a well-executed train wreck in slow motion, it provides a foil to the relationship of Nazuna and Kou, and it raises the stakes of their budding romance. I think most of the complaints are rooted in the fact that this is a tragedy. They find it frustrating because it is not what they wanted from the story. They believe it’s out of place, that it's "unnecessary drama," that it doesn’t belong. But this is a story about misfits and the nature of love – people who are socially on the fringes of society exploring what it means to be in love and fall in love. A Romeo and Juliet plot, a display of the kind of frustrating, retarded, self-destructive,
lethal love which people sometimes experience – that feels completely on brand for this kind of story, if you ask me. The detective's arc was also about love - about the betrayal of love (her father's actions, and her own betrayal to Nazuna), and the ugly kind of hate which takes the place of that love. I wouldn’t be surprised if the next arc focuses on two other ugly aspects of love – envy and unrequited love. That's totally on brand.
Like idk man. I don’t really see the point of getting into an autistic internet shouting match over this. You can have your opinion, I’ll have mine. But I disagree with the overwhelming majority of people on this one, and that disagreement is genuinely rooted in my own analysis of the story, not any feelings of superiority.
Edit: I've reread the story. There's some parts of my analysis that I'd change - Kou is initially dead set on basically kidnapping Mahiru
IF Kiku is lying to Mahiru (Ch. 111 pg. 7). And part of the motivation for keeping Kiku alive was so the detective could question her, Kou wasn't doing it
just for Mahiru. Despite this, on a reread, it's even more obvious how everything was building to this arc. The foundations were laid in some of the earliest chapters. And the different philosophies of Kou and Mahiru towards love were established and contrasted early. This was something that was always building in the background until it escalated into a full boil. Give it a reread, a
serious reread, where you actually take the time to soak in the dialogue instead of breezing through it. While the minute to minute writing probably wasn't done until not long before the chapter was serialized, the plot was and major story beats were clearly fleshed out before hand. You can tell from all the offhand comments that foreshadow later plot developments, or depictions of characters in the background before they're properly introduced. Kotoyama wasn't just winging this. Love, and all the forms it takes, has been at the forefront of this story since the beginning. This arc definitely belongs in this story and exists for good reasons. Not liking this arc is fine. But it's not bad storytelling. It's just not the kind of story or characters that most of the audience wanted. Maybe the only reason I enjoy it because I'm happy to relax and go wherever the author takes me. I want to see what the author has to show me, and my only stipulation is that it be well written and thought through. This was.