This DLC is Chapter 3, "The First Fall," of The Grade 5B Case Files.

The annual sports day is just around the corner, and all the preparations are proceeding smoothly. Yet somehow, this year's event feels a little different.

Class 5B finally managed to submit their event registration forms before the deadline, with both Holmlyn and Watsonia signing up for the events they excel at. On the day of the sports day, everything seems just like previous years—the opening ceremony, the event schedule, the lively crowds in the stands, and the cheers echoing across the field. However, as the festival unfolds, one unexpected incident after another begins to occur. What could be hiding behind these strange events?

Holmlyn: Watsonia... don't you think something feels a little off about this year's sports festival?