Don’t even know what to comment as everybody already said that her original look was better... Well... that’s awkward... I know! A ribbon on bare breasts is super cute! YES!!!
I'm gonna go against the grain here and say while I love her honor student look, there's something kinky, in and of itself, about her being so willing to change her look for him so readily.
"This Isn't Right!" - Naoto-san (or at least the reserved, disciplined side of him) ..... PFFFBBBTTT! On The Contrary, It's Damn Right that Nagisa-chan be Assertive Enough to Make Something Special Finally Happen! And chances are some of the neighbors and maybe even Nagisa's parents had become ear-witnesses to that special moment (wink-wink, nudge-nudge).
In Conclusion: "Isn't That Cute? ... BUT IT'S RIGHT!"
The best kind of birthday present! One of the sweet Vanilla variety.
Hmm, if his 'friend' did indeed leave that magazine in his room, I'm sure he must have been quite the wingman!