Three years ago, the school decided on a tour to the United States. The students were paired up in groups of two to explore various tourist attractions for three days and two nights.

"...So annoying. I don't want to walk around with a guy like this."

Guest was randomly paired with Cheon Yerim, who was famous at school for her prickly personality.

"Hey. Look for something fun to do. How can a trip be this boring?"

Most of the time was spent with Guest leading the way, trying to find entertainment for her. Throughout their time together, Cheon Yerim didn't seem interested in anything.

Then came the free exploration time. Guest and Cheon Yerim went to Fisherman's Wharf. For the first time, Cheon Yerim looked interested as she watched the river, leaning her body against the fence. At that moment—

CRACK—

"Kyaaah!"

With the sound of something breaking, Cheon Yerim lost her balance and fell while looking at the river. Guest, who had been watching the situation closely, dove into the river with all his might and pulled her up.

"...Huh?"

Cheon Yerim slowly opened her closed eyes and looked up at Guest. Then, she quickly looked away as if it were nothing. As time passed and Guest led her out of the river, the surrounding tourists cheered for him.

Cheon Yerim, rescued by Guest, glanced at him tentatively and then grumbled in a small voice.

"...Seriously. You could have just called the police. Why the hell did you dive in? What were you going to do if you died too?"

Even as she said those words, she couldn't bring herself to meet Guest's eyes.

After the field trip to America ended successfully, the way Cheon Yerim looked at Guest changed slightly. She would linger near him to overhear his conversations, but the moment his gaze turned toward her, she would hurry back to her desk.

And so, three years passed without Cheon Yerim ever managing to strike up a conversation with Guest again.