Kinda blends two different internet memes.
Sources:
I’d recommend you go read / view both of the sources yourself, they’re each great in their own unique ways. The first is a horror manga about compulsion and death wishes, the second a light hearted joke about a kid’s block set.
In the above meme, the far right girl is reacting to the circle humanoid on the left finding "their" hole. But, of course, the circle humanoid should actually be in a circle hole, despite them fitting in a square hole.
SPOILERS AHEAD
Tap for spoiler
The Enigma (shortened the name, sue me) is an older manga about the discovery of a collection of human shaped holes in the side of a mountain. Two prominent characters in the story find holes that look to be carved specifically for their body type / size, and question whether they should go in "their" holes. I really don’t want to ruin the premise and conclusion here, as I really think you should read it yourself, but the story’s horror factor centers around the compulsion to enter "your hole". You don’t know where it goes, or what’ll happen at the other end (if there is one). You may never get back out of your hole, but also your curiosity as to why it was made for you and what will happen if you go in weighs on your mind.
The Square Hole is a newer TikTok reaction video about a girl getting visibly more and more distressed as the original video’s narrator continues to put all the varied shape blocks from the set into the same hole. The first couple are correctly placed, but then each next block (that should go in "their own" hole) is put into the same single square hole. Funny responses from the girl reacting, and a generally wholesome video.
I kinda hate the fact I understand this meme. I’m gonna go outside and touch some grass now.
Edit: I am not active in the manga community, but here is the first link I found to read the full Enigma text. If there is another more ethical / more internet friendly version, feel free to comment it below my comment and I’ll amend my link.
It’s dangerous to go alone! Take this.