The Anthem of the Heart (Kokoro ga Sakebitagatterunda)

The Anthem of the Heart (Kokoro ga Sakebitagatterunda) 

Is an anime film produced by A-1 Pictures and directed by Tatsuyuki Nagai.

The film explains us a feeling you cannot tell anyone, you have locked in a cage in your heart. But actually… He wants to shout his true feelings to the four winds. A girl who hurts people with her words has sealed her words so she will never speak again. Their encounter with music and allies is beginning to change it. 

Jun Naruse
	Jun is the protagonist. She was originally a very upbeat, cheerful child, but after she exposed her father's unfaithfulness to her mother, she became quiet, timid, and unable to speak. She later finds her voice by joining Takumi and the others in making a musical, in which she plays the main character.
Takumi Sakagami
	Takumi is another central character, who like Jun, is also quiet and timid. Like Jun, his parents are divorced, and he lives in the care of his grandparents. He plays piano, and played a major role in helping Jun set up the musical for the Charity Committee
Daiki Tasaki
	A member of the school's baseball team, he is initially seen as grumpy and fully rejects the idea of the musical. Through the course of the movie, he learns to warm up to his classmates, and plays a central role in the musical. He also starts to develop feelings for Jun, and eventually confesses to her.
Natsuki Nitō
	Takumi's ex-girlfriend, she still retains feelings for Takumi. Though initially reluctant to join the musical, she warms up, and becomes a close friend of Jun. It is suggested Daiki had feelings for her, though she rejected them.