I've tried as hard as I can, but I cannot make out that first kanji in the bottom-right balloon. Even blowing up the image does not help, and the pic is no longer indexed on the artist's site or Pixiv, so I can't tell if there might be a larger version available.
As for the small text outside balloons in the lower half of the page, forget it. It's ants on a screen as far as I can say.
DAMMIT, Japan, stop using tiny fonts on crap-tier resolution images that aren't ever going to show up offline! GRRR.
As for Vivio, well, when she grows up, she gets like that.That's not true at all!
(Wendy)Don't you think it's strange?*staaaaare*Even if you say that...
(Wendi)Cinque-nee? Wh- what's up?It's embarrassin', bein' stared at like that... *wobble*Boi-oi-oing ♪We're sisters, and yet, there's so much of a difference between us...In fact, aren't you bigger than before!?
Those breasts are enviabinexcusable!
(Cinque)Sheesh. You'd think someone who apprenticed under the likes of myself, Vivio, and Vita would end up a bit more modest...
(Cinque)Hey, Cinque-nee, if you can get them to teach you how to grow big...flat...maybe you'll have some big bouncy ones, too?Vita's said she's gotten big, at least to a certain extent.Reinforce's in the same boat with her.I... I don't believe it...!I'm just guessing~I'll fill it!
I'll fill it for sure!
(fill breasts)
Kushieda Minori's catchphrase.