Ugh, I know that feeling... Luckily I've been able to get away from the panic attacks, but I still blush really easily, which is suuuuper embarrassing.
I totally relate with black haired main character as well-- the blushing problem especially--it happens when I'm overwhelmed, overstimulated (smells, sounds), angry, frustrated, upset, confused, embarrassed, shy (romantically), which covers a lot of emotions. It has gotten me in trouble when certain people misread the situation and think I like them when I don't. But it's the worst around people I am especially conscious of, like guys who are my type, or because of a certain attribute that I'm attracted to. It takes all my effort to maintain a calm face or normal face instead of being flushed red and blushing all the time. Sometimes I actually found that I have been called "ice queen", or "tight faced" behind my back at work! I wear bright cheerful colors arms try to smile often enough, but it's a fracking struggle sometimes ╮(￣▽￣)╭
I am an introvert and I also suffer from social anxiety like Kitagawa, and man it really sucks. I get embarrassed very easily, some social situations give me panic attacks. So I can really relate to him in a lot of ways. Can't wait for more updates ٩(๑❛ᴗ❛๑)۶