Lolol actually it might have been that way but I don't think they are similar. What I am saying is blondie was made relatable to the mc, not based off on him. It is kind of like when a author makes a character relatable to themselves or the ppl around them. Not everything will be based off them but just to this point where the other person feels sympathetic because they went thru the same thing or something similar. That's how i see it at least.
i think the myungha now isnt similar but his teenage self was the same way as yeowoon thats why he understands why he's so stubborn and doesnt accept help easily because he was the same way and closed off everyone but i also think the author was sus we dont know who he is and if he purposely threw myungha in the story hmm
this should have the selfcest tag. now hear me out: the author of the novel created blondie yeowoon BASED off the mc myungha's past and personality and then myungha fell in love with that character that is 100% him so technically with himself. lol well a hot prince version of himself that iss