Kokoro ga Sakebitagatterunda.

The Anthem of the Heart, subtitled Beautiful Word Beautiful World, is a 2015 Japanese animated youth drama film produced by A-1 Pictures, directed by Tatsuyuki Nagai and written by Mari Okada. The original title is Kokoro ga Sakebitagatterunda. (心が叫びたがってるんだ., lit. "The Heart Wants to Shout"), and it is abbreviated as Kokosake (ここさけ). It was worked on by the staff who had previously worked on the anime series Anohana: The Flower We Saw That Day and its film adaptation. It was released on September 19, 2015. A manga series by Makoto Akui was serialized in Ura Sunday.

Plot
Jun is a girl whose words have been sealed away. She was once a very happy girl, but because of a certain thing, she said when she was very young, her family was torn apart. One day, the egg fairy appeared in front of her and sealed away her ability to talk in order to stop her from hurting anybody else. Since this traumatic experience, Jun lives in the shadows away from the limelight. But, one day, she is nominated to become an executive member of the "community outreach council." On top of that, Jun is also appointed to play the main lead in their musical...