Belly button style?
This one has a bit of a long explanation- So you see, this series is actually based off of a prequel series called “love is an illusion,” which in turn is from a series called “if you hate me so.” The main characters from “love is an illusion” are originally side characters in “if you hate me so”.
The author posted a comment in his creator’s notes (ch 18.5- i think…) of the series “if you hate me so” that says the following: Actually, I’m planning to draw another extra. Yes, the belly button is bigger than the stomach.
There’s a translator note to the side that comment stating: Fargo used this idiom here meaning,”Doing more extras compared to the main story.”
You’re welcome
From this author- Are we doing another belly button style, might as will be its own season, side story epilogue?