The first seven chapters show how Shouya's bullying went too far and then got turned on him to the extent that he was Driven to Suicide, showcasing in full effect how Kids Are Cruel.
The movie makes this incredibly clear, harsh and heartbreaking with Shouya repeatedly stealing or damaging Shouko's hearing aids and mocking them with his classmates; it's taken to an unexpectedly low and cruel point where he wrenches one from her ear so forcefully Shouko starts to bleed. It's also another instance in the future in which Shouya's scapegoat status is made abundantly clear, as Ueno still takes, mocks and steals Shouka's hearing aid, showing she's learned nothing.
Chapter 51 is one long tear jerker. First we see Shouko's tear soaked face after Shouya fell off her balcony. Then there's her Imagine Spot where her elementary school days were happy, including her getting along with her classmates, her mom being happy, her dad being present in her life. This ends with an image of her lying in bed sobbing. Then there's the vision she has of Shouya, where he says farewell to her, causing Shouko to run out of her apartment late at night.
Nishimiya's Love Confession to Ishida. Feeling self-conscious by Ueno's reappearance in their lives, Nishimiya changes her hairstyle and refuses to sign to Ishida, instead insisting on saying her confession out loud. However, due to her Speech Impediment, Ishida thinks she's talking about the moon instead. Nishimiya looks on the verge of tears as she realize that he didn't understand her confession at all. The next chapter shows that Nishimiya did end up crying when she got home, as well as lying in bed and kicking her feet in frustration, over the fact that the person she cares about most not understanding her.
The death of Yuzuru and Shouko's grandmother. She was the only person that Yuzuru related to the most, and despite putting on a strong appearance she can't help but cry.
Shouko's declaration of self loathing to Ueno on the ferris wheel. And this is after Ueno straight-up told Shouko that she hates her as well.
Chapter 32 shows just what happened to Yuzuru and Shouko's father. He abandoned both Shouko and her mother once his parents found out about it because they didn't want a disabled child in their family. That left the mother working to support both of them while her grandmother helped take care of them.
Chapter 39 has Kawai telling everyone that Ishida bullied Nishimiya in the past just to get a reaction. It leads to fighting among the group and splitting them all up. This eventually leads to Shouko trying to kill herself, believing that nothing good comes from being around her and Ishida falling in her place after trying to save her.
The scene where the film critic eviscerates the movie they made. It's just so heart-breaking to see Nagatsuka brought to tears over it. Especially since they decided to make the movie for Shouya after he ended up in a coma.
Amongst the criticisms brought against the movie, he ridicules the main character's thick eye brows, which Mashiba had been bullied for in the past. Unlike the rest of his friends besides Nagatsuka, who react in disgust or anger, Mashiba just shrinks and utters "I'm sorry, everybody".
Another criticism was the movie being silent with subtitles, which the critic scoffed as a lame attempt to be "artsy" or "deep," when the real reason Nagatsuka made it that way was so deaf people could follow it, particularly Shouko.
The scene where Yuzuru tearfully explains why she put pictures of death up in her room: to show Shouko what death is like in the hopes that she'll be put off wanting to kill herself because she doesn't know what else to do. It didn't work.
Yuzuru then takes the photos down from the wall, feeling that they're useless now. She finally forgives her mother, after years, when the latter helps her dismantle the collage.
In Chapter 52 when Shouko tries to find Shouya in the middle of the night running to their meeting place. She's frantically searching for him and when he's not there she's in tears, bawling her eyes out. She has a dream sequence about Shouya and during it she understands him perfectly, but she can't say a thing when he tells her that she's way happier without him. You can see her struggling to get her words out, but can't. It's one whole chapter that piles on the tears and despair Shouko feels when she finally realizes that he's the most important person to her and without him, she's so lost and heartbroken.
Nearly everyone's treatment of Shouko after her attempted suicide. She is offered no help, called stupid by Yuzuru and the only ones to stick up for her are her mother and Shouya's mother. On top of this, only Shouya, out of the entire group, apologises to Shouko for bullying her. Ueno blames Shouko for the bullying (and the introversion Shouko naturally formed as a result) and tries to destroy her new friendship with Shouya and Kawai plays down her role in it. And Shouko's still big enough to try and make friends with them.
Chapter 43, where Ishida makes a Heroic Sacrifice to prevent Nishimiya from committing suicide, builds effectively towards its dramatic conclusion, as Ishida runs through all the things he's done, and whether or not they are truly reflective of atonement or are just aspects of his selfishness. And he resolves, if he gets the chance, to truly make an effort to do what's right by everyone. And as he falls due to the effort it took to save Nishimiya, he sees her crying in utter anguish and terror as he falls away, and he realizes that he may just be falling to his death. It's even worse for the reader, who knows that the look on Nishimiya's face is the look of someone who's watching the person they love fall to what might be their death.