Technically they are getting bigger, it's just that each new character introduced seems to be trying to one up the previous character in that department. I'm convinced that at this point the artist is trying to see just how big is too bigHad the thought that all the breasts in this comic were getting bigger. Went back to chapter 1 and nope, consistent. I think the mangaka has just gotten better at placing them constantly as the focus of a panel.
Now that you mentioned how can I expect anything other than one that turns you into a frog?Sooo what we expecting?
My money is on:
1. gender bender spring
2. Litteral De-aging spring
3. One that turns you into a frog