I Feel Like I've Met That Bratty Cosplayer Somewhere Before

At a small local event, the protagonist runs into a cocky little cosplayer who seems strangely familiar. With her teasing tone and bratty charm, she leads him in circles, acting as if they’ve known each other forever. Who is she, really? And why does it feel like they've met before?
As the noise of the crowd fades into the background, a strange, nostalgic connection begins to unfold — a slightly lewd, slightly mysterious encounter that just might uncover a long-buried memory.