These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Critical Dissonance: The anime has become this after its first episode aired. The consensus among many viewers is that it isn't good due to the controversial art direction, while reviewers generally have been quite positive about the series, including the art direction.
Crowning Moment of Heartwarming: For a series that was once so dark, angsty, and uncomfortable, some events especially post Time Skip may seem like they're from a completely different series because of how damn warm and fuzzy some of them will make you feel.
The He's Back ending of chapter 46 is a beautiful reprieve from all of the horrible things that Kasuga has put his parents through and makes it seem like he's finally healing from his past trauma.
Basically any moment where Kasuga and Tokiwa interact. When you take into account how badly he has been treated in the past and then see how much Tokiwa cares about him, it's hard not to let out an "Awwwwww!" at the following:
When Kasuga is crying about Tokiwa's novel and how much it relates to his life. Considering how closely the contents of it relates to previous events of this series, there's a good chance you'll be crying along with him.
Kasuga's Anguished Declaration of Love toward Tokiwa in Chapters 44 and 45. As well as her subsequent reciprocation. And then their laughter, hand-holding, and hug.
Chapter 46, their first chapter together as a couple, is filled with cute little interactions between the two.
Epileptic Trees: Fans have already speculated that Kasuga will commit suicide. Judging by the content of this manga, it's not much of a crackpot theory. And at this point many are just wishing they would just do it already.
Kasuga tries, as well as Nakamura. But for some reason Nakamura kicks him out of the way before he could kill himself with her and she is stopped when tackled by her father.
Fans are starting to speculate that, after the events of Chapters 40 through 46, Nakamura will soon return to ruin Kasuga's life and new relationship. They've gone as far as saying that the plane that is shown flying past in a single panel in Chapter 46 is carrying Nakamura.
Whether Nakamura is involved or not, some fans are pretty sure that Kasuga's relationship with Tokiwa will soon fall apart in spectacular fashion.
Fan Nickname: Aku no Potato, based on the... controversial character designs and animation methods employed by the anime. Another favorite is Rotoscope no Hana
Freud Was Right: Certainly comes true in later chapters, though Nakamura gives clear indication she believes this.
Internet Backdraft: The anime adaptation was originally subject to this by the truckload due to its rotoscope animation.
Whatever you may think of him, there's no denying that Kasuga's life has become an utter hellhole thanks to Nakamura and he at least deserves some pity. That is, if it wasn't his own fault to begin with though.
Some of his problems definitely were his fault. However, it was clear that he was always very meek, insecure and impressionable, making him ripe for Nakamura's destructive influence.
The chapters leading up to the Time Skip made Saeki to be a pretty big one as well, even after she committed rape and arson in an attempt to win Kasuga over.
Nakamura. It is very clear that she is suffering from some kind of severe unnamed mental illness and is unable to cope on her own or prevent herself from dragging Kasuga down with her. Also, she very well might have strong feelings for Kasuga, but is unable to express them due to her illness.
Just Shoot Him: Pretty much what many readers of the manga are stating towards Nakamura and Kasuga.
Kasuga's reception has gotten quite a bit better after the Time Skip, especially after he Took a Level in Badass out of the blue. Even people who hated him in the past and/or still hate him admitted that pouring his heart out to Tokiwa in front of her boyfriend was a pretty ballsy move. Other people have said that him finally having something go his way made him a more relatable character.
Moral Event Horizon: Nakamura crosses this when she smashes Kasuga's father's kneecap. Before that, she had done some terrible, terrible things, but that was the moment where her acts of cruelty became irredeemable.
You know it's time to start screaming whenever Nakamura belittles or threatens Kasuga. Case in point: This doozy,◊ when Nakamura forces Kasuga to wear Saeki's gym clothes under his clothes when he and Saeki go on a date.
The Time Skip has drawn some complaints due to Nakamura being put on a bus as well as Kasuga starting to have an actual romance that has yet to be destroyed by either her influence or his stupidity.
Tear Jerker: The last few chapters of volume 3 have been this for all characters — yes, even Nakamura.
Saeki's "The Reason You Suck" Speech toward Kasuga is heartbreaking and oddly nauseating when you take into account that she raped him yet has the audacity to invite him to lunch... and then tell him he's a terrible person.
Uncanny Valley: The animation of the anime uses rotoscope instead of traditional anime-style which places the series pretty close to the bottom.
What an Idiot: Kasuga consistently falls into this, perhaps out of a desire for self-destruction. He always seems to do the worst possible thing at any one moment, and it always come back to bite him. To say he can't let go of the Idiot Ball is an understatement.
Kasuga's parents. They watched their son grow more and more distant only to discover the horrible acts he had committed. His mother eventually broke down and proclaimed herself to be a total failure as a parent.
Likewise, Nakamura's dad is arguably is one too. It's clear from his behavior that he's concerned and worried about Nakamura, in spite of her psychopathic behavior.