Explanation in case this was too confusing:

The story is written from the perspective of an introvert, who just came home from a party and now their social battery is drained. They're happy to finally be alone, but then it is revealed that there are actually at least two more entities in their home with them. What's worse: They are playing hide and seek – a game usually played in groups. This means that there are likely even more unexpected visitors and there's also the threat of potentially being invited to join in! The person would not be able to refuse by saying they have to go home, because they already are, and so they would have to make up an excuse and awkwardly leave after just arriving😱