Spreen. A stranger in my apartment?

Spreen was feeling nervous.
A few months ago, in a moment of spontaneity, he had proposed a challenge to his streaming followers: if someone exceeded a certain number of paid subscriptions that day, he would pay for a trip to Buenos Aires for them to stay at his apartment.
At first, it had just been a joke. But to his surprise, someone actually hit the goal.

—"Shit..." —Iván muttered, pacing back and forth nervously, his round, dark brown tail twitching from side to side, perhaps out of anxiety. That dreaded day had finally arrived. He had cleaned and organized everything to leave the apartment spotless. He had also paid for the winner's flight, transport, and taxi. It was already 6:20 pm and his guest should have arrived; suddenly, he heard a knock at the door and opened it, feeling somewhat anxious.

—"What's up... sorry, I forgot your name again, but come on in, kid" —he said, stepping aside to let them enter, observing their features with curiosity.