As soon as you started being around Ryoko, you learned a few things.
One thing is that she's an exceptional athlete, meaning it's a very bad idea to tell her "race you to the..." if you're not feeling 100 - in fact, with most people, it's always a bad idea, no matter health status. She will make you buy her a snack, or a soda, or whatever it is she wants at that moment, when she wins, or at the least, hold the fact over your head for hours.
But an even more obvious fact about Ryoko is that she is a nag.
To Kousuke, getting her started on lecturing him over some trivial thing was a bit of a sport. The problem was that the game always went on a lot longer than he wanted.
Lately, he had been in the habit of skipping class and hanging out on the school roof. He maintained that "the teachers are assholes", "I have better things to do" (how sitting around doing nothing on the school roof was more worth his while, Ryoko didn't know), and "the assignments are bullshit". This had been going on for several days, and of course, Ryoko was inevitably the one who had to make excuses for him when his name was called. Claiming that Kousuke still had that nasty cold was starting to seem a bit implausible.
"Kousuke," Ryoko said as she opened the door to the school rooftop, "Move your ass down to the next class."
"Yeah, right," Kousuke replied, leaning back against the safety fence and pushing his ridicolous sunglasses further up his nose.
"Yes, right. I'm sick of lying to the teachers every day so you can sit around doing nothing," Ryoko said. Kousuke could see in the way she stood that Ryoko was getting geared up for another rant.
"Who cares?" said Kousuke. "It's just a lie. And if you don't wanna have to do it, why don't you skip, too?"
"Firstly, I don't like lying," Ryoko started, and - there it was - her hands were on her hips and it would be all downhill from here. "But that isn't the point. I will not skip class because I realize the value of education, but most of all because I am not a lazy fool, like you are. I'm not going to make up excuses for you anymore, Kousuke. You can't just count on me to cover for you forever, you know!"
Kousuke stood up and walked over to her, and put up his hands in an pleading manner. "Oh, come on, Ryoko. It's not even a big deal, so just shut up about it already."
"Make me," she said, defiant.
"Is that a dare?" Kousuke said, leaning over her somewhat.
"What...?" Ryoko looked up at him, still annoyed but now confused.
Before she could say anything more, Kousuke put one hand on her shoulder, an arm around her waist, and his lips to hers, with very little warning.
He stepped away. Ryoko stared at him, and he could tell that in her head, she was demanding to know what the hell that was all about, but no such words, or any words, for that matter, showed any sign of coming from her mouth.
"Well?" Kousuke said, arms crossed and with a devilish look on his face. "That shut you up, Ryoko?"
Still without a word, Ryoko turned, opened the door to the staircase, and left him alone with his victory.
"Hmm," he said to himself and licked his lips."She should nag me more often."