The music is perfectly chosen, and your timing is amazing. The animation is solid, and the story intriguing.
The only problem here is your understanding of anatomy and physics. If Kim's breasts are as large as the profile and full body frontal shots imply, they should be visible even from a 3/4 high angled shot, and they should BOUNCE. No bra was made yet that could hold in that kind of jiggle. Also, at times the bosom seems to be just stuck on her (and her friend) in one big lump, independent of her torso size. Remember that the torso supports the breasts, and therefore is always relevant in size (no stick thin torso plus mammoth breasts!).Try using an anatomy doll and observing women (as discreetly and non-creeper-ly as possible) running and jogging.