Kokoro ga Sakebitagatterunda.

As a child, Jun Naruse talks freely and believes life should end like a fairy tale. One careless revelation about her father destroys that illusion and contributes to her parents’ separation. Blamed for speaking too much, Jun imagines a mysterious egg placing a curse on her: whenever she tries to voice her feelings, severe pain grips her stomach.

Years later, the nearly silent Jun is chosen to help organize a school musical with Takumi Sakagami, Natsuki Nitou, and Daiki Tasaki. She discovers that singing may let her express what ordinary speech cannot. As the four students bring their own regrets into the project, Jun begins searching for a way to free the words she has locked away and finally make the cry of her heart heard.