yey!!!..i saw that as well.
super cute indeed. I wonder where I can get those too. Are they from Lezhin or some store?
https://twitter.com/ByeonDuck_/status/1215135157511839744
The author is selling merchandise. :3
https://smartstore.naver.com/lezhinstore/products/4784502378
I saw this link too and even made an account, but I guess it's not for international buyers unfortunatelly.
https://twitter.com/kosan0715/status/1215092302995017728 its on the author's twitter (at least i think?) but OMGG ITS SO ADORABLE AWHHH IM SCREAMING