Difference
Azuma Yunoki had an odd fascination with numbers.
He didn't exactly like numbers; useless things for statistics and costs, really. But math with people...
That was interesting.
Shimizu-kun minus his sleep. Hihara with half his energy. Amou-san with a saxophone. Tsukimori with a twin. Azuma added, subtracted, multiplied and divided everyone, summing two together, multiplying others, dividing some apart. He, of course, never factored himself into his equations; he was too unique of a number, not worth his bother to do complex math with people such as them.
Hino, however, was a strange number as; a prime one, maybe. Two, perhaps. She factored many, reducing them when you took her from them, adding all the more if you put her back. Like an exponent almost, changing everything in huge amounts simply by being around.
He watched her as he did his math. And though he was tempted, Azuma refused to put himself into her equations. For if he took the difference, subtracted her from him...
Azuma knew he'd have nothing left.