Ishida's nascent friend group has a falling out when his history as a bully becomes known.
He spends most of the summer with Shoko, even reconciling a bit with her mom.
They all go to the fireworks display together.
Shoko leaves early. To study, she says.
Yuzuru asks Ishida if he will go get her camera, which brings him to their home just in time to stop Shoko's suicide attempt.
And because this is that kind of movie, in his attempts to pull her back up after her jump, he falls off himself.