Damn, this is awesome! Shizuru's expression is like "I don't want you to read my brain or mind. That's embarrassing." and Natsuki's expression is like "I wan to know all your secrets Shizuru. Even the embarrassing ones. You cannot get away from me until I find them out."
Natsuki: "You're not getting away that easily!" *Grabs Shizuru's face and brings it close*
Shizuru: "Geeze Natsuki"
Natsuki: *Blush faintly due to closeness*
Shizuru: (Thinking) Where's Natsuki's and My clothes gone to??? STOP THINKING BAD THOUGHTS IN CASE NATSUKI FINDS OUT!! *Frowns*
And there is a bit of a back story to this masterpiece.
But about Shizuru and her bad thoughts. I don't think she can avoid Natsuki finding out about them. Which is not necessarily a bad thing, considering they are already naked and all... Imminent steamy times, I'd wager.