Koe No Katachi Episode 1 -

Here is a blog post focusing on that impactful opening sequence.

Director Naoko Yamada and the team at Kyoto Animation use this opening to establish the film’s unique visual language. Koe no Katachi Episode 1

What makes this opening act so effective isn't just the cruelty; it's the honesty. It refuses to paint Shoya as a "cartoon villain." Instead, we see a child who doesn't understand the weight of his actions until the world collapses around him. It’s a painful but necessary foundation for a story about the messy, difficult path to forgiveness. Here is a blog post focusing on that

The "first episode" of this story ends with a harsh dose of irony. After months of relentlessly bullying Shoko—culminating in the loss of her expensive hearing aids—the school finally intervenes. In a sudden shift, Shoya’s "friends" turn on him to save themselves. He goes from being the ringleader to the school’s new pariah, a shadow that haunts him well into his high school years. Why It Hits So Hard It refuses to paint Shoya as a "cartoon villain

Since Koe no Katachi (A Silent Voice) is a critically acclaimed rather than an episodic TV series, there isn't technically an "Episode 1". However, the movie's opening act—covering Shoya Ishida’s elementary school days—functions as a powerful introduction to the story.