I don't want to be pessimistic, but 4-komas are rarely known for their quick closure.
I feel like it's pretty debatable whether this is a 4-koma, though? I mean, there's a lot of 4-panel pages, but they're frequently arranged dynamically and often don't end on a punchline.
"4-koma" is a pretty specific format and structure. 4 panels, usually square, equally sized, typically arranged in two columns. Each column is devoted to a single setup and payoff for a particular joke.
This gets close sometimes, but I don't think most people would classify it as a 4-koma. It's also developing the plot a bit more consistently than most 4-koma and even some other humor comics.