First one.
Also, this is my first attempt at writing for this fandom. Review if you like it? ^^;
The bell rang its shrill alert, signaling the end of the lunch period. Dib eyed the small invader as he took his seat across the room from him. Burns and abrasions splotched across the skin of his mouth and chin, lips slightly peeling as he scraped at them with his serrated teeth.
It never ceased to amuse the boy that after millenniums of what Zim claimed to be technological superiority to all other planets, the Irken race couldn't handle something as common as rainwater or certain meats. Then again, materials humans considered highly acidic or toxic could be counted as harmless on his planet.
Nevertheless, Zim's severe intolerance to the liquid and crippling fear of weather forecasts made it easier for Dib to take control over the stubborn invader, in more ways than one.
As the alien opened his mouth to answer a question presented by the teacher, it was easy to see Zim's serpentine tongue sported an array of tender scalds as well. He winced as he tried to form the words in the raw condition of his mouth. After a minute of struggling to talk without biting back in pain, Zim finally gave up and slumped over on his desk. False blue eyes crept across the room, finally locking his gaze with the human studying him.
Dib flashed a grin and licked his lips, the invader in turn flushing a deep shade of viridian and averting his gaze. Rain wasn't the only thing that consisted of water.
For a split second Dib felt a pang of guilt for causing him that amount of pain.
Then again, Irkens did heal considerably faster than humans did. And Zim always did like it rough.