You want an extremely socially awkward Shy Bear of a man to have a haircut that doesn't represent him? I think it suits him and easily shows his personality, just like with His boss Beother his Long hair and no hair covered forehead shows confidence and royalty. Design of characters isn't purely for readers pleasures but to show what kind of person you're dealing with
there are many hair designs that fit the “shy bear” stereotype, im just saying this one’s shit, like objectively his hair has no volume, its just flat on his head and looks like it’s constantly wet, AND DONT GET ME STARTED on that goofy ass mullet
if you really wanted to fit the shy stereotype, i think it should be more untamed and much longer
also you need PEAK character design to rock grey hair and lets be honest now…
heonjae would’ve been a 10/10 if it wasnt for that yee yee ass haircut