What was the name of a movie about Japanese high school students setting off super fireworks more than ten years ago?

5 centimeters per second. In this movie, the male protagonist Tobio Taketori left the city where the heroine dreamed of after graduating from college and went to work in a distant place. Before he left, they made a giant firework together and planned to set it off at the summer festival. However, because the hero left the city, the plan could not be realized. A few years later, the hero returned to the city and met the heroine again. On a date, they finally realized their plan that year and set off huge fireworks. Makoto Shinkai is a famous Japanese animation director and screenwriter. He was born in 1973. His representative works include "5 Centimeters per Second" and "Your Name". ”, “Weathering with You”, etc. He has received wide acclaim for his beautiful painting style and profound emotional descriptions, and has a large number of fans in Japan and around the world. His works have been recognized by Japanese and international film awards many times, and he has made great contributions to the development and promotion of Japanese animated films.