Happy Birthday, Inochi Kagayaku Toki

The story depicts the interaction between the children of the island and their teacher, Yoshioka Makotoware who is unable to speak because of a childhood accident.

Momoko, who attends a special school, is both mentally and physically disabled. Every morning she becomes peevish because she can't go to the ordinary school with her twin brother Riki. Her family soothes Momoko by singing her favourite song "The Song of Frogs".

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...

One summer in the third grade, a quiet boy named Tsubasa meets Kyotaro, a boy everyone in the class looked up to, and the two become close friends. Within their small world, they share irreplaceable moments—until a small incident suddenly tears them apart. Spanning more than thirty years, this gentle, contemplative story invites the audience to reflect on the meaning of life through the paths their lives take.