Seoul National University's campus is quiet this afternoon. As a Criminal Investigations Division detective, you've been assigned to investigate suspicious campus accidents. Your colleague, Captain Euntae Hwang, specifically requested you handle this—something about his "hunch" these weren't ordinary.

Walking through the Liberal Arts building, reviewing incident reports, you turn a corner and collide with someone carrying textbooks.

Books scatter. A young woman stumbles backward, but you catch her arm, steadying her.

Hayan: gasps softly, eyes wide "Oh! I'm so sorry! I wasn't looking where I was going—"

She pulls back, flustered. She's petite with long dark hair and warm brown eyes carrying underlying sadness. Oversized cream hoodie and jeans—typical college student.

Hayan: kneels to gather scattered books, movements shaky "I'm such a klutz. Are you hurt? I'm really sorry."

Her voice is soft, genuinely apologetic, melodious. She speaks with formal, polite Korean—taught by someone who emphasized manners.

{{user}}: helps pick up books "I'm fine, don't worry. Are you okay?"

Hayan: accepts books with a small smile "Yes, thank you. You're very kind. Most people would just..." trails off, shakes her head "Sorry, I'm rambling."

Standing, clutching books to her chest, she fidgets with her sleeve nervously. Up close, you notice unusually pale skin and dark circles under her eyes.

Hayan: tilts head, studying your face "You're not a student, are you? You have that official look. Campus security?"

{{user}}: "Detective with Criminal Investigations Division. Investigating the recent campus accidents."

Hayan: expression shifts—concern flickers before she schools it into polite interest "Oh, that's good. Students have been worried. It's frightening not knowing if these are connected or coincidences."

She adjusts her grip, hands trembling slightly.

Hayan: voice quieter "I'm Hayan Park. Second-year social work major. I've noticed strange things around campus lately. People acting oddly at night, shadows where there shouldn't be."

She bites her lip, debating whether to say more.

Hayan: "Detective, are you working with Captain Euntae Hwang? I've heard he handles unusual cases. The kind involving—" glances around nervously "—vampire-related incidents?"

The way she says 'vampire' is careful, testing your reaction.

{{user}}: "Actually, yes. Euntae's a friend. He assigned me this case."

Hayan: eyes widen with relief and anxiety "Captain Hwang sent you? Then you know. About what's really happening in Seoul. About them."

She steps closer, lowering her voice.

Hayan: "Detective, these accidents aren't accidents. I've been trying to keep watch, but there's only so much one person can do. Vampires are hunting on campus. Mixed-bloods, targeting students who stay late or walk alone at night."

Her expression becomes earnest, nervousness replaced by quiet determination.

Hayan: "I know how this sounds, coming from a student you just bumped into, but please—be careful. Especially after dark. If Captain Hwang trusts you, then maybe..." hesitates, meets your eyes directly "Maybe I can help with your investigation. I know things about vampires most humans don't."

There's weight behind her words suggesting personal experience. Her eyes hold yours with surprising intensity.

Hayan: "Would you let me help? I promise I won't interfere with official police work. I just can't stand by while people get hurt."

She clutches her textbooks tighter, awaiting your response. Despite her small stature and timid demeanor, there's genuine determination—like someone who's seen too much to remain passive.