Ok, of course I was exaggerating for the sake of the joke, but being dead serious and completely honest about it:
Dai
does look a lot older for a Japanese man of his age, and I
don't think it is because of his acne scars (or face skin actually).
I mean, even in the heavily edited promotional pictures where you can't get a glimpse of his acne, he definitely doesn't look like 23.
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(The second one, specially. It's insane! Lol)
And I don't even mean that as a bad thing. The guys I find the most attractive in the show are the ones in their thirties, Taeheon, Kazuto (almost 30) and Alan (although unbearable, I do find him handsome). A lot better than the baby face of Shun and Ikuo (who I think production chose a very bad picture for the promotional material, btw).
As a non-asian who spent the last decade in Japan, I totally get the western thing of "east asians look so young" and it did take me a while to start seeing it, but I'm 100% sure Dai gets called 老け顔 (fukegao, Japanese for older-looking face) on his private life all the time and that's not even a bad thing, since so many people find 30s-looking men more charming.
I mean, look at this! (from his instagram)
View attachment 138841051
Btw, I wish him all the luck and completely agree with Bella that he showed a lot of maturity dealing with Shun. Green flags for Dai if anything.