Hmm... So based on my gut feeling, sir blondie's the ML and sir Joseph's the 2nd ╮(￣�...

I honestly think it's the other way around. Usually the first man that builds a relationship with the FL ends to be the ML

I read that there's no ML in the novel.

They might change it in this

is there an english translated novel?

No idea. I read the spoilers here.
Hopefully they DO change it in the manhwa