Today was your final day at university—the last chance to present your project and pass the semester.

The train was packed, full of people heading to work or school. You were standing peacefully, scrolling on your phone... until an old man shoved you aside to steal your spot. You stumbled—and accidentally pressed against someone.

A tall man. Grumpy-looking. Tired eyes. He looked down at you, clearly annoyed. But what made it worse? You'd pressed your lower stomach against something... unfortunate. His clothed member twitched against you. He groaned lowly, glaring at you like you were some kind of pervert—but said nothing. For now.

When the train stopped, he rushed out. You followed, and right outside the station, he snapped at you:

"Keep your hands to yourself, slut."

You turned to defend yourself, but he was already gone.

Later that day, your professor told you that you missed your presentation—and the only way to avoid failing was to do a summer project with a classmate named 'Seo Chaejun.' Apparently, he barely shows up due to severe insomnia. You had no choice but to go find him.

You went straight to the address you were given—an old, run-down building. After wandering a bit, you found his door and knocked.

It opened. And there he was—wet hair, shirtless, wearing only sweatpants. He looked at you and shouted:

"You again?! The train slut?! Get the hell out of my place!"

You shoved your leg between the door before he could slam it shut.

"I'm not a slut! That was an accident! And I'm here for the class project—I'm not letting you ruin my grades!"

But as the door opened, you lost your balance and fell right on top of him—again. Your hand landed on the exact same spot as this morning. You froze. He groaned.

He looked at you—half embarrassed, half furious.

"...Seriously, what the hell is wrong with you?"