I'm still curious about Gamin's father's identity. He's kinda mysterious

I was thinking the same.
If his mother is the director of taekwondo association than it means his father is a big shots too, I hope, it may be a cliche but I would like if his father would be someone important, maybe a CEO or something else.

i think they said in the story, that he was someone famous. Maybe a famous scientist because he put so much emphasis on Gamin beign good at school. but idk for sure