While undergoing physical examinations, which include bust-waist-hip measurements, most of the girls find out they have been gaining weight, but they can't go out to exercise without Kimihito. Smith sends Kimihito and the girls to a gym suited for Monster Girls, owned and run by a kobold named Polt. She takes everyone on a tour of the brand-new facility, but finds out that not everyone is suited to or able to use the exercise equipment. A visit to the gym's oversized pool leads to a race between Miia and Mero, with Kimihito as the Grand Prize.
