Boku no Kokoro no Yabai Yatsu

Kyoutarou Ichikawa may look like a shy and reserved middle school student, but deep within his heart is a bloodthirsty killer. His ultimate desire is to see his classmate Anna Yamada's beautiful face writhing in pain before he ends her life. But this fantasy may never come to fruition, as Ichikawa starts to see an entirely different side to Yamada.

Often seeking refuge in the library, Ichikawa frequently runs into Yamada. It is during these encounters that Ichikawa realizes his model classmate is actually an airhead who can never read the room. As they spend more time together, the boy cannot help but feel not only a sense of endearment toward the very girl he wishes to murder but also a desire to protect her at all costs. Is it possible that this sudden change in Ichikawa's perspective could lead to something more?

[Written by MAL Rewrite]

Yamada, Anna Main

Youmiya, Hina Japanese

Ichikawa, Kyoutarou Main

Horie, Shun Japanese

Ichikawa, Kana ing

Tamura, Yukari Japanese

Sekine, Moeko ing

Han, Megumi Japanese

Yamada, Sanae ing

Minaguchi, Yuko Japanese

Imaginary Kyoutarou ing

Fukuyama, Jun Japanese

Kobayashi, Chihiro ing

Asai, Ayaka Japanese

Hara, Honoka ing

Toyosaki, Aki Japanese

Adachi, Shou ing

Okamoto, Nobuhiko Japanese

Yoshida, Serina ing

Tanezaki, Atsumi Japanese

Matsui, Yuuko Producer

Sotokawa, Akihiro Producer

Endou, Kazuki Producer

Kurashima, Youichi Producer

Reviews

May 19, 2025

Sidarif

Recommended

One of My Favorite Anime of All Time
Boku no Kokoro no Yabai Yatsu completely blew me away. It’s not just a great romance anime—it's one of my absolute favorites of all time. I genuinely loved everything about it: the story, the characters, the art, the music—all of it hit me right in the heart.

At first, it might seem like your usual quirky school rom-com, but it quickly grows into something so much deeper and more emotional. The relationship between Ichikawa and Yamada is incredibly well-written. Their awkward, realistic chemistry made every small moment feel meaningful. Watching them grow closer episode by episode was beautiful ... and honestly addicting.

The art and animation are clean, expressive, and full of detail. You can really feel the emotions in the characters’ eyes and body language. The soundtrack also fits perfectly and helps elevate the emotional scenes. It’s the kind of show where I found myself smiling, tearing up, and fully immersed in their world.

Every episode left me wanting more, and there wasn’t a single moment I didn’t enjoy. This is the kind of anime I know I’ll be rewatching again and again.

Final Thoughts:
If you’re even slightly into romance or coming-of-age stories, watch this anime. It’s pure, honest, and full of heart. For me, it’s not just a 10/10—it’s a 100/10.

Reviewer’s Rating: 10

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Mar 29, 2025

angelmaycryy

Mixed Feelings

If you are a fan of comfy fun romance anime then this is definitely a show for you. It doesn’t reinvent the wheel or asks any thought provoking questions most of the time, its a simple story about a lonely boy who falls for the popular girl. The progression is decent and and the animation is pretty good. One thing i like about this anime is that the “fanservice-y” moments are there not to necessarily arouse the viewer but more so to show the awkwardness of sexuality during your adolescence.

Although i do have a complaint with this show and this specific gripe i have ... is something thats preventing this show from being an 8 in my opinion and that is, they pretty much remove the plot of the protagonist having murderous urges. At the end of the day he is just another edgy kid. Going into this show i was honestly expecting something like if Dexter was in a rom com anime but that wasn’t the case. Three episodes in the whole “wanting to kill her” thing is pretty much gone which is unfortunate cuz i thought it would be more gradual and earned. That’s not to say that this show is bad but it definitely could’ve been something much more.

Reviewer’s Rating: 7

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Oct 22, 2024

BadGuyBoog

Not Recommended

(Updated review because MAL doesn't let you make new ones for some reason.)

Original Review:
You know, I don’t really mind when a show divulges (or better yet evolves) from its premise, even if it was character based. Of course as the character grows, motivations change and the circumstance changes with it. Like in Love is War, the whole premise is trying to get the other to confess, but when they get together, that premise is gone, but still because of how the characters were developed, there was still a lot more story to tell. The premise evolved and changed. That is a good series. But I’m ... sorry, you cannot just forget your premise of, oh yeah, your main character planning the murders of his classmates! Like seriously, this kid is actually fucking deranged, carrying around a box cutter waiting for the perfect moment to kill people. That is the actual premise of the show. A loner who plans to murder people falls in love. And the show just glosses over it. He’s just added onto the pile of loners who get with the popular girl but like… This kid was going to kill people, you can’t just pretend that didn’t happen! This show makes him seem like just another loner character, but other loner characters are just sad and unconfident, not psychotic. Basically you’re just supposed to forgive him and feel sympathy for him because now he’s in love. Even though there was literally a moment where he was about to stab her before chickening out. What the actual fuck? And the girl isn't even all that. She has 3 character traits: she’s ditzy, she likes snacks, and she has big boobs. Her big boobs are one of her 3 personality traits. Did I forget to mention she’s in middle school? The more I think about this show the worse it gets. I mean if you want to make the argument saying it’s a statement on how tragedies including loners who snapped could be avoided, then I’ll say, do you really think this show is smart enough for that? Be real. I don’t think anyone has ever actually made that argument, but now that I think about it, that’s the only way this premise could work. But that takes smart social commentary, a focus on his murderous intentions and the reasoning behind them, and a full character evaluation on both the protagonist and the love interest. This show is not smart enough for that.

Updated Points:
This is a review I wrote casually and I wasn't expecting it to get the attention that it has, and because of how nonchalantly and somewhat jokingly I wrote it, I have gotten a lot of angry comments complaining about my review. So I thought I might press my point and address theirs.

The main argument my somewhat angry fans pointed out to me was his murderous intentions were never meant to be a focus and were never meant to be taken seriously. What I'm assuming they meant was his thoughts of killing people were meant to highlight his isolation and loneliness, therefore emphasizing the impact the heroine has on his life. Following that line of thinking, my point of them abandoning his delusions early on is nonsensical because from the moment she enters his life, his loneliness diminishes and so does his desire to kill. It's a progression of the story and his character and not an oversight or lack of competence by the writer.

My response to that is, what kind of deranged or dethatched people think that murderous fantasies of people you know is a normal response to being a loner? Maybe I'm wrong because I was never what you would consider a loner, I always had at least one friend. However, lets look at what his fantasies are supposed to represent. Our main character feels like he doesn't belong. No one has reached out to him and because of that he has grown increasingly jealous of people around him. With this, a person can go two ways. Either blame it on themselves and have extreme low self esteem or blame it on others and grow spiteful. Our MC is the latter. So now he's spiteful of his classmates for having friends and a 'normal' life and is enraged at seeing their happiness. I understand this.

However, in no time during this did his classmates ever act malicious towards him. They might have pointed out that he was a loner, but as far as we know from this season, the MC hasn't been bullied or threatened, or even excluded on purpose (maybe, it's been a while since I've seen it ngl). My point is his murderous intentions aren't out of response to some severe stimuli, where he feels murder is his only option, it is a result of nothing but jealousy.

And the argument that it wasn't meant to be taken seriously doesn't work either. We, as an audience, know that he, deep down, doesn't have the guts to do what his delusions are telling him to do. We know that he's not gonna kill. But the protagonist has convinced himself he is. And he's prepared. And he carries a weapon with the intent to use it. I mentioned how he planned on killing the heroine at one point. We know he's not going to, but he thinks he's ready to do it, only chickening out due to a lack of guts, or willpower, or maybe some part of goodness in him. But the fact remains that he believed himself capable of killing her. And she had done nothing wrong to him. In fact, she had been nothing but kind to him up till that point. That takes a deeper level of hatred then just jealousy in order to get to that point, and if it's not that, then something else is going on mentally to get him to that point.

The writer never addresses this, never explains how he got to that point and never intended to use his murderous intentions as part of his story. Notice I said murderous intentions instead of fantasies, because the moment he brought the knife, it became an intention. My point was, that his 'bloodthirstiness' was nothing but clickbait to get peoples attention and a mark to differentiate his character from the other thousands of loner characters. The writer never wanted to write a character with deep rooted problems, or show his character in deep distress, because he just wanted to write a romcom. Perhaps he was too afraid of his Protagonist being too unlikable, but buddy, that's the point of writing stories. Those fantasies are real and dangerous, and to use it as clickbait for your story is both lazy and disrespectful.

I stand by my original opinion. Also the other complaint I got was I called the heroine bland but like, dude, I'm not gonna argue over your fucking middle school waifu. I didn't care for her, I thought it was kinda funny so I added it to the review. My bad.

Reviewer’s Rating: 1

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