I am a huge fan of dear door.
I can't link images here, but there's plenty of instances, if you check, especially with the aliens (the ML and the yellow one), that their heads are long in the profile - they're almost flat on their head's crest, like a table.
Heads don't quite work that way - once you notice it, it's really hard to stop seeing it.
So, in the first chapter, when Sombrero introduces himself, and says "my real name is sombrero but i go by this other name (korean name)" - his head is misshapen somehow, and too large. It's supposed to be perspective, I think? I need to re-read it, but I remember laughing hard when the long haired yellow alien showed up, and either had a huge head or just a huge amount of hair on the top of his head. I dunno, it's just looking off to me.

Is it just me or do these folks suffer from Hydrocephalus? Their heads (under the hair) are so fucking large, and the ML's head is also flat on top - I bet you could put a brick on it and it wouldn't fall. I'd like to believe it's just hair, it's just too long - unless some mayan skull lengthening took place.
Despite it, the art is really pretty, just reminds me of 2009 yaoi proportions. If done well, it's art; if not, it's a medical emergency.