It's something like half brother trope, isn't it?

What? Your comment pulled me here. What's going on?

Not likely, no.
Since the brother that disappeared is a snake.
And the Mc is a white fox.

It’s confusing but I think there’s a mistranslation and they have the “hyung” relationship. It should make sense why it’s translated to brother when they have zero resemblance. (TДT)

Ah i see.. I think the younger bro is a rich boy who ended up missing when he was a kid. And somehow the fox's parents saved and raised him. Then his family found him and took him back. Or something like that..... (?)

Ah, the adoption plot ^^ wonderful, lolololol.

Honestly, I wouldn’t be surprised if the story went that way as long as they’re not blood related at all ╮(￣▽￣)╭