Chalk Dust
"Chalk dust, chalk dust!" Fiyero crowed triumphantly.
Elphaba fixed a stare at the back of Fiyero's head. "So?"
Fiyero grinned. "You made a mistake!"
Elphaba rolled her eyes. "For your information, I was running out of room. I did not make a mistake."
"Sure."
"Would you care to look?" Elphaba invited sarcastically.
Fiyero turned around, but his grin immediately faded in disappointment when he saw Elphaba had told the truth.
"You don't trust me, do you?" Elphaba asked accusingly, turning away from him.
"I was wrong, Elphaba. I'm sorry." He pulled her back and kissed her lightly. "Better?"
"Better," she confirmed. "Now, it's time you were off. I'm late for class as it is."
Fiyero agreed reluctantly.
As he left, Elphaba suppressed a giggle at the sight of a rectangular print of chalk dust on his pants.