The two of them look like they have low body fat percentage but I suspect Kanade's is below 20%… Her period must be irregular and her PMS is probably terrible and she's probably sensitive to cold

About Hayami Kanade's and Sagisawa Fumika's bodies

Hayami Kanade, her pelvis is somewhat widened but her legs are slender so this gap is for sure amazing

The position of her lower back and her hips are higher up than Sagisawa-san's Her stomach has muscles that make an '11'! (You can see it in illustrations)

Fumika-san, her pelvis isn't that wide, but since she's sitting for a long time a her inner thighs probably have some flesh on them Not a lot of fluctuation in weight or size

Their hands and feet are basically the same size, but from inspecting the 3D models, Fumika-san's fingers were just a little longer~

Fumika-san's abs probably don't stand out, but in exchange she has a really pretty body line And also! This!!! I want it to be like this!!!

Since she's unexpectedly strong, I think she's the type that has some muscles on her back The both of them have amazingly slender waists but the difference between the two of them is:

Fumika-san's back is wide, and has a big shoulder blade line

Kanade's collarbone is pointed so her shoulders are widened Her shoulder blades make a straight line, and give the impression of being vertically long

Subtly different… "Yoru-iro no Hanayome (Night-colored Bride)" pre-idolized and Cheering Star, they look skinny- Maybe afterwards Trainer-san scolded them and made them gain weight

Her collarbone seem pointed. Her breasts are a little more pointed than Fumika-san's? She's the type where she loses weight from the breasts when losing weight and also gains in her breasts first when gaining

Fumika-san has breasts more widened to the sides than Kanade-san's. Slumped shoulders and a hunched back. You can see her collarbone but it doesn't stand out. →So, when she's in a proper posture, maybe it looks big?