恋と推理の剣道大会（前編）

The National High School Spring Kendo Tournament is being held at Toto Gymnasium, and Heiji has made it to the semifinals. During the lunch break, referee Nukitani is murdered when he has his throat cut. The old blind man Katsunari at the crime scene says the killer headed into the bathroom after the murder. The individuals inside the bathroom, Nenji, Tsuneyuki, and Akane, are suspects. All three had motive to kill Nukitani. The tournament is nearly canceled, but Heiji panics, as he has something he wants to tell Kazuha when he wins...