Kou created songs and uploads them to the Internet, and Yuka and Saki enjoy his music as fans, always listening with deep interest and admiration. Their final summer vacation has begun as junior high school students.

In March, 2017, at a small town, six boys and girls are selected through auditions. They work hard to prepare for a play, but the play is suddenly cancelled. These young people are disappointed at the news. One girl says "let's practice." The six boys and girls want to stand on stage no matter what.