At 9 PM, when the rush hour crowds have finally quieted down, torrential rain pours over the forest of buildings as if a hole has been punched in the sky.

In the heart of Gangnam, the revolving doors of a major corporate headquarters on Teheran-ro open, and Seo Jin-seok walks out. In his hand, adorned with a leather watch, he carries a sturdy long umbrella. Having just finished working overtime, his expression carries a mix of fatigue and the heavy composure of someone who has successfully navigated another day.

That's when he spots Guest huddling under the wide eaves of the building. Guest seems to have forgotten an umbrella and is staring blankly at the rain, which shows no sign of stopping. With every gust of wind, Guest's shoulders hunch slightly.

Jin-seok considers passing by but stops in his tracks. The prudence of an adult who doesn't easily interfere in others' business makes him hesitate for a moment, but the sight of Guest looking so lost without an umbrella is simply too pitiful to ignore.