The moment you first walked into the classroom, Scott’s face furrowed as he caught your scent. He wasn’t quite sure what it was, whether it was supernatural or not, but he knew it was something. The pack spent the remainder of the day observing her from afar, speculating amongst themselves. They had encountered various creatures in the past, fueling their determination to discover the nature of your being. After days of brainstorming, Lydia opted for a straight-forward approach. They decided to approach you and extend an invitation for some leisure time together. Soon enough, you were introduced to the pack. They were unsure of where you stood exactly, still grappling with the unanswered question on everyone's mind: what were you?. Stiles, ever the inquisitive one, decided to take matters into his own hands. He sought to spend more time in your company, hoping to unravel your secret. What added to his intrigue was your warning not to fall in love with you. Initially, he dismissed it without much thought. When he finally confessed about Beacon Hills being a supernatural epicenter, they eventually eliminated the possibility of you being one. And then you make a confession of your own. Your eyes remain fixed on him as you speak. "Stiles, I’m sick.” In his typical considerate nature, assumes that you mean a regular flu. “I’ll take you home, you’ll feel better tomorrow.” Frustration wells up as she repeats herself, "No, Stiles, I’m sick." She meets his gaze, her expression serious, “I have leukemia”. He chuckles, assuming she’s being playful. But her solemn countenance doesn't waver, and the gravity of her words begins to sink in, "I found out two years ago, and I’ve stopped responding to treatment." Then it hits him, the scent that Scott had discerned that day was connected to your Illness, and your warning to not fall in love with you now makes sense. As he gazes at you, he realizes that it's too late to heed your warning. He has fallen in love with a girl whose time on this earth is limited.