It tells the story of a girl who traveled through time in The Prince of Tennis to watch the plot up close. She originally wanted to be a silent bystander, but in the end she was taken away by someone.
"I just want to be a silent bystander and watch the plot up close."
"Haha, you can watch it up close even if you are next to me."
(The heroine will not change the plot, so this article will follow the plot, but there will be an additional heroine)