I feel like there might br more details in the novel, but for now i feel like its because the blond one is almost obsessed with mc. And hes a attractive guy thats in his proximity, we have women in the story however they dont suit him/dont see the potential of seeing them 'loving" him/dont appear alot. However there is the blond one who is the opposite of everything listed there.
mb forgot to add the archive link of their ship tag on archive of our own aka ao3
https://archiveofourown.org/tags/Han%20Yoojin*s*Sung%20Hyunjae/works
Someone please tell me why everyone ships mc and blondie together? I want to know before i start reading