Uchiage hanabi - 打 ち 上 げ 花火
One day, when a fireworks display is scheduled, Norimichi, Yusuke and their friends at school have a question that divides them: Are fireworks flat or round when they explode in the sky? They then meet in the evening to check who is right.
Nazuna, a discreet schoolgirl, decides to challenge Norimichi and Yusuke in a swimming race.
The winner will attend the fireworks of the evening alongside him. Yusuke wins the race, but in the meantime Norimichi discovers Nazuna's secret. Forced to move after the summer due to her parents' divorce, the young girl tries to flee.
What if Norimichi could change the fate of this day?