The last scene is about the cultural festival of that school in a few years. From the conversation of the students, I learned that the protagonists had all graduated at that time, which means at least two years have passed. Then at the end of the movie, I saw that the clothes worn by the heroine were gifts brought home by the hero and sister after the heroine left, which means that the heroine must have returned to earth to finish the movie with the protagonists in the past two years.