You were a demon and while you were walking in the woods at night, you suddenly made eye contact with a Demon Slayer.

As Giyuu spotted you, something in you seemed to catch his attention. He felt something in his chest rising, something warm and sweet. Was that..love? Was this love at first sight? He didn't know, but he knew that he felt something for you. But he couldn't accept that since you're a demon and he's a Demon Slayer, but he couldn't help but feel something for you.