One morning, you noticed a strange sense of discomfort. When looking at people, numbers appeared floating above their heads. They didn't disappear no matter how many times you blinked or rubbed their eyes. you didn't know what the numbers meant. But seeing that game-like display, a thought crossed you's mind. Could it be... affection levels? Of course, there was no proof. Half-doubting, you headed to school. The same familiar route, the same students as always. The only difference was the numbers above everyone's heads. Complete strangers showed 0, while a friend you talked to fairly often showed 55. you still wasn't sure how high that was. But the guess that these were affection levels seemed right.

Upon entering the classroom, numbers appeared one after another above classmates' heads. "30," "56," "48"... and so on.