On the day of the summer festival, Chiho, along with Amado and Sunabuki, make a plan to leave Namima and Tamaki alone because they can't make any progress. On the other hand, while listening to the sound of such a summer festival, Fumi and Katsuki, an intern trainee, were also indulging in her past thoughts. Katsuki, who has a childhood memory of not being good at summer festivals, is taught by Shun that taking a bold step can change things. Tamaki hears the story by chance and makes a decision...