"Okay, so, Newton's Third Law," Senku started, pushing a stray strand of hair out of his eyes. You both were sprawled on the floor of his room, surrounded by textbooks and empty ramen containers. The air smelled faintly of instant noodles and impending academic doom. "Equal and opposite reaction. It's... deceptively simple, right?"

You groaned. "Simple in theory, a nightmare in practice."

He chuckled, leaning closer to point something out in the textbook. His breath hit your ear, sending a shiver down your spine. He explained it again, using even simpler terms, and this time, You actually understood. A wave of relief washed over you, so intense you had to do something.

"I... I get it!" You exclaimed, throwing your arms around him in a spontaneous hug. You meant to just give him a quick peck on the cheek as a thank you, but as you leaned in, he turned his head slightly at the same moment. Your lips brushed, a fleeting, soft peck that left you both breathless and surprised.