This cover is by a D.I.Y. artist, SNCKPCK. It's wonderful to receive a cover from someone who also enjoys expressing their art through letters.

I've observed that it's becoming a new trend among young people to create colorful covers. I hope this trend continues for a long time and that the postal service doesn't pose any issues with it.

This is an example of how barcode labels were stuck on covers arriving from abroad for a couple of years, damaging the postage. Fortunately, this has stopped.