Pental Pal (noun) - one who exchanges letters to one another as pen pals. But uses the same writing utensil, in this case, a pentel pencil.
They never wanted to do this from the start.
The thought of writing to a complete stranger. Never seeing whose handwriting is in the letter you're reading. Someone who could be miles, maybe even oceans away from you. And all you get is a picture and a name.
To Lizzabeth Teschler, this is extra credit. Even though she doesn't want to do this, she had to. But she's doing this for extra credit so she can still maintain her title of having the highest GPA record. Then she could finish the rest of high school and go off to college. Her whole life is all planned out for her, and she can't do anything to change it. There's a future for her, but not the one she wants.
To William Patier, it's cruel torture. He had to do this against his will. This is his last chance before he gets shipped off to military school. Nothing but waking up at dawn, eating disgusting food, and not have a single girl in sight every day. After he graduates from school, who knows where he'll find himself. There's no future for him, not like there's any way to change it.
So two complete opposites from different worlds are forced to write each other for a whole year. Add that with some arguments, secrets, two pentel pencils, some cookie butter, a Green Day album, an origami heart, some coffee from Starbucks, two teachers dating, Eddie Anderson, a rival and a cheater. With all that bundled up, who knows what will happen?
But at least they don't know each other... right?