Koe no Katachi

In sixth grade, Shoya Ishida leads the class in bullying Shoko Nishimiya, a classmate who is new to the school and is deaf. When Shoya's actions are finally condemned by the principal, all of his friends and teachers turn against him, socially isolating him well into high school to the point that he eventually considers suicide, which he believes would absolve him of his bad deeds. To make amends, he reunites with Shoko, who is still lonely due to her shyness. Realizing that both are suffering due to his past sins, Shoya sets out on a path of redemption by trying to reconnect Shoko with their old classmates that Shoko never had the chance to befriend back then, including Shoya's former comrade, Naoka Ueno, who holds a grudge against Shoko for "causing" Shoya's isolation; Miki Kawai, their narcissistic former class president; and Miyoko Sahara, a kind girl who was the only one attempting to befriend Shoko years before. They also make new friends in Tomohiro Nagatsuka, a similarly friendless fat boy who owes Shoya; and Satoshi Mashiba, Miki's crush. (Source: Wkipedia)