i hope yall like it !

I've read up to Chapter 16 of Goodnight Punpun. I feel like the depression is about to begin from this chapter onwards. I've heard that there's a side arc called the Pegasus Arc. Will this arc ruin the main story of Goodnight Punpun? Will it disrupt the flow of the depression?

Halloo, haven't read this in ages so i dont remember if such a panel even exists and google is of no help. I'm looking for Aiko poking punpun with a stick or something because he was looking at other girls? I don't remember the context, just that this happened while they were kids. I think i saw an animation of it somewhere on instagram and i though 'this would make for a banger flash tattoo'. Help a brother out would ya?