- Adaptation Displacement: As a result of Horimiya getting published and translated in the west, it displaced the original Hori-san to Miyamura-kun there.
- Base-Breaking Character: Hori has become one in the fanbase due to her violent and jealous tendencies, particularly because she tends to take it out on Miyamura. On the flipside, she is still very supportive and caring towards him and knows exactly how unreasonable she is, even once becoming concerned that he won't care about her anymore.
- Eight Deadly Words: Due to adapting Omake's chapters and ignoring the endgame plot, some readers got tired of the story past Miyamura's Christmas proposal and admitted to being neutral to low regarding of the cast besides Hori and Miyamura, given their development takes up a lot of chapters as well.
- Ensemble Dark Horse: Iura ranked third in the popularity poll despite not having a character arc in the remake at the time, and getting far less focus compared to the rest of the supporting cast.
- Evil Is Sexy: In-Universe Hori considers a dominant Miyamura this. She doesn't quite get why, though, to his chagrin.
- Harsher in Hindsight: Miyamura's comment towards Hori in chapter 1: "I figured after yesterday, you would do your best to avoid me." Seems like a light-hearted statement based on Hori's public image issues (based on her reaction from earlier in the chapter) but it goes much deeper than that for Miyamura.
- Hilarious in Hindsight: In chapter 4, Hori off-handedly says to Miyamura that he looks thin enough to fit into her clothes. It turns out (in a much later chapter) that he is. And then some. To her predictable chagrin.
- Given we know how the manga is going to end via the webcomic, characters saying or suggesting certain things is funny. So stuff like Hori's teacher assuming Miyamura got her pregnant in chapter 4, or Miyamura introducing Yuriko and Kyousuke as his parents to Ishikawa in chapters 15 and 66, respectively, can be seen as humorous nods to forward events.
- Ho Yay:
- Repeatedly, between Tooru and Miyamura once they become friends.
- Also Miyamura and Shindou. Good lord Shindou acts like he's in love with Miyamura half the time.
- Tanihara (one of Miyamura's middle school bullies) can't accept that Shindou is friends with Miyamura. The way he talks, it's as if Tanihara thinks Shindou belongs to him.
- Never Live It Down: Remi is a sweet and kind person with a bit of a mischievous streak, but some people just won't forgive her for making trouble for Hori when an accounting book was misplaced.
- One True Threesome: Sakura, Sengoku, and Remi are nearly inseparable and do care for one another a great deal. It gets to the point where Sakura says that she'd be perfectly okay with marrying both of them if it came down to it.
- The Scrappy: Sengoku's girlfriend, Remi, is not well-loved by the fans, let's just say. She's generally flighty and tends to cause problems for Hori through her impulsive and flaky behavior.
- Rescued from the Scrappy Heap: This seems to have changed in later chapters, though, as her more likable traits have come to light and her relationships with Sengoku and Sakura has been given some depth. In-universe, she's even become a good friend to Hori and her gang. She still has a die-hard hatedom, but then again, who doesn't?
- Shipping Bed Death: At least on some forums, the general consensus of the series went down after Hori and Miyamura got together. The main criticisms of their relationship boil down to most conflicts stopping and no more exploration of them as people and as a couple, especially with Miyamura slowly losing the attributes that drew those readers (and Hori) to him in the first place. This is largely owed to the Omake chapters being used in between the original Hori-san and Miyamura-kun adaptations, padding out the story and subsequently the drama that comes up near the end of the webcomic.
- Tear Jerker: After Tooru rejects Sakura's confession, she goes on to see Tooru and Yuki together. She acts like the weight of the world is off of her shoulders now that she's confessed and gotten that out of the way, but after Sengoku gets the message and tries to comfort her, she immediately breaks down crying. Love Hurts, indeed.
- Unnecessary Makeover: Miyamura eventually cuts his shoulder-length hair into a shorter, more boyish do. He says it's because he wants to fit the image of what Hori's boyfriend should look like and avoid her being teased because of his meek looks, with several people commenting that the new haircut looks much better on him. The fans tend to disagree, stating that the change was unnecessary and looked better beforehand. Funnily enough, in-universe, both Hori and Watabe have a similar reaction to most fans and want Miyamura to let his hair grow again. After he reveals that some of his piercings are closing up and he doesn't have any intention of opening them again, more complaints followed.
- What an Idiot!: Miyamura's former middle school class-mates/bullies think it's a good idea to continue where they left off — right in front of Hori. They do so because they think they can drive him into further isolation by getting her away from him. It doesn't end well for them.
- What Do You Mean, It's Not for Little Girls?: The series could easily fit in a shoujo magazine, but it's published in a shounen one instead.
- Periphery Demographic: That doesn't stop it from being incredibly popular with female readers, especially since it has no shortage of pretty boys.
- Unpopular Popular Character: Shu Iura. He's this series' designated Butt-Monkey, with a sister who thinks he's an idiot and his friends all largely agreeing with that. However, he's monstrously popular, scoring third out of the cast members in the official poll.
- The Woobie: Miyamura in his younger days. He was neglected and isolated by his peers and put down whenever they felt like it. It got to the point where he was having destructive thoughts about wanting them to disappear. It hasn't completely disappeared even though he's in high school and mostly away from them but he won't defend himself no matter what they say.
YMMV / Horimiya