A/N: I am, in fact, not quite sure how I got this out of the prompt.
languid
One day, she removes her blazer from her chair and starts buttoning it up. She gets to the second from the top button - only there isn't a button. It's gone. She looks on the floor, under her desk, in her book bag and in the end, she scratches her head and puts a hand on her hip. She can always buy another button but...
Then she sees the glint of another button, except it's not unattached to a piece of clothing.
"Koizumi-kun, take your coat off."
"... Miss Suzumiya?" Naturally, her friend is quite confused, but he does as she asks. Haruhi removes his second button from his coat, bites the loose string and hands his coat back to him. Itsuki makes a small o with his mouth, before putting it back on.
It's only when he buttons it up that he notices which button she took. She's already sewing it on, though.
The second button from the top of a male's uniform is often given away to a female he is in love with, and is considered a way of confession. The second button is the one closest to the heart and is said to contain the emotions from all three years attendance at the school.