This makes me wonder who his biological parents were, if he’s so insanely good looking

For real

I have a theory, it was mentioned that MC's adopted mother's older brother died in a plan crash or something and he had a relationship with someone, so maybe that woman got pregnant and left him in the orphanage or something (maybe lacking financial support for the baby). But who knows.

Owshii you're onto something! If that really happens to be the truth, I'd be be so elated omg