The Overflowing Bra

All praise to a master of the craft! You are doing to community a great service by donating your time and skill. And you have my eternal gratitude. 
If you are looking for another concept I've often dreamed of a minigts story involving a volleyball camp. Girls growing to fit the needs of the team and all that jazz. 
Anyways, you're the fucking man. Thanks for time. 

Been here for a while and I've got to say this has to be one of the best stories I've read in the past few years. You could very well be the next Stewy or Greapos or Hunter S. Creek. Please keep up the good work. I didn't particularly enjoy your 'New School' story because of the non-focused main characters. This story, however, held strong because of the much stronger bond through the female protagonist's physical changes.

I love this story, your method for writing "unaware" breast expansion is amazing. I'd love to give you some ideas for stories. You can message me on reddit if you like. I use the same handle there.

I very much enjoyed this story, and with the slight mind alterations, I appreciated that it wasn't bimbofication. I'm always a fan of a woman keeping her intelligence, or it being boosted, so I was pleased.

I enjoyed the story very much.  I will echo comments others have made that you might consider a bit more detail in your growth sequences.
I wanted to say one thing in particular.  A running theme in your works so far has been a moment when the protagonist basically says to the transforming heroine, "You're approaching an extreme that may be hard to live with.  Are you sure this is what you want?"  I appreciate this a great deal.  As fantastic (as in a work of fantasy) as the scenario is, it seems like a realistic concern to have.  This in turn adds believability to the character.
That being said, in this work you included a bit of light personality change as well (Though I suppose it may be that this is also a recurring theme of yours.  It seemed more incremental in this instance).  Grace became, as you put in the description, more flirty as she grew.  However, there was a moment in the story where the protagonist basically realizes that the women he is dating is no longer the friend he had earlier in the week.  In short, the original personality is now gone.  From a narrative standpoint, you're covered because from the protagonist's view point he and Grace were only distant friends, but it's fairly tenuous.  For the protagonist's concern to seem genuine he should likely be concerned about any extreme change, especially one which appears to have changed the fundamental nature of a friend.  Just something to consider if you should use a similar type of change in the future where the character's relationship is more established.

This is a great story. It could use some more detail about how she was growing, or how big she was after a growth spurt; but otherwise it was great.  Good descriptions of what Grace looked like, and what she was wearing.  Clothes ripping is always a good touch, and ripping clothes for the hell of it just can't be beat!

Very well done story. I liked the hyperlonk daydreams you put into it. Thanks for the effort!