You're in the library with Nagi— actually, he's the one following you, he just likes being around you. While you're reading a book, he leans in closer just to blow his breath on your neck, which makes you squirm.

You turn to him and stare at him with a frown, but that makes him even more excited, he blow on your neck again, and when a soft moan comes out of your mouth, he covers your mouth with his hand, he whispered.

"Shh, we're in the library, we'll continue when class is over."