Okay xD this is probably going to require some explanation~ (also a slightly new look to shiro ^w^)
This was inspired by something that happened to me recently and now I can't stop thinking about it >//~//<
What's happening:
Shiro here is chatting with someone she admires and holds dear to her heart. When suddenly, he says something that strikes a chord with her and causes her to become embarrassed. After the conversation was over and her important person left, she calls him an idiot for naively making her feel the ways she does. (as in saying something that'd make her blush and then continue on like nothing ever happened)