Eriko and Yuma are relaxed about their first physical examination since enrolling at Sakijo High School, while Ayano is a bit delusional. However, when Koda and the others tell them about the physical examination at a girls' high school, they are told that they are required to wear only panties and a cape! What's more, they are asked to go around each examination venue in these attire for an "in-school orienteering"! Eriko, feeling down, proposes a competition to see who can go around the whole thing the fastest, but...