After some expert boob analysis, here are my results for breast quality of the three knockouts girls we have here:
1) Sensei (the biggest boobs but also the least perky/shapely).
2) Eri (the second biggest boobs, very close to Sensei's size/similar shape. Not as big as Sensei, and not as perky as Masami, but definitely perkier than Sensei, since Eri's don't sag as much as Sensei's massive boobs. A nice balance between size and perkiness/shape).
3) Masami-chan (the smallest boobs of the three (yet still is rather busty in her own right) and has the perkiest boobs of the three.
All in all, this chapter was boobs galore. Peak. Eri has surprising, or should I say unsurprisingly, such a hot body. Would smash.