I lol'ed so hard when I read Suwako's line. It made me think of this one Johny Bravo short with his mom basically saying the same thing, except the clothing was pants. Still, I could so hear it, lmao.
So, she gets clothes she declares she can't wear, because it would expose her breasts, so she doesn't change her clothes, and runs to the only guy she knows to complain about how much her breasts are going to pop out. When he tells her how to prevent exposure, she exposes herself to him, then asks her to dress her. Then she wants to flash her panties (which she forgot) to Rinnouske.
Either she's just a total ditz with no common sense whatsoever, nevermind "Gensokyo's common sense", or she's actually gotten to understand the ("Sad Truth") common sense of Gensokyo, that the one person she's completely guaranteed will not ever have sexual interest in her is Rinnouske.
Rinnosuke... Luckiest bastard that ever was. 777. Now if only he was of "Action" (terrible referencing, I know).
Reading outdoorsThis is my favorite set of underwear... Do you think it's cute?Under... wear...?Sanaeee! Panties! You forgot your panties!!Rinnosuke-san, may I have a moment?Sanae, what is it?A Girl's Heart and the Autumn Sky