1+1=?

After dinner, Penny dragged Slater to the library for a briefing. Seated on the chair, Slater's jaw hit the floor at the stacks of books in front of him. This sight was too overwhelming for him. 

"This…" Slater scoffed, averting his dilated eyes at the little sister standing behind the table. "I have to read all of this?"

"There's more. Don't worry."

"There's more?!" his face drained of colors as his face twisted in dismay. 

Looking at him, Penny wondered if she even made the correct decision. These books were just too basic. Even Penny in the first life understood them quickly. 

"Penny, I can't do this," Slater confessed, while shaking his head vigorously. "This is too much for me! I can't do it like this or I'll die — ack!"

Slater nearly bit his tongue when her hand struck the back of his head. He gasped in disbelief, looking at her with dilated eyes. 

"Did you — did you just smack my head?"

"I did. So what?"

"Penny!"