Responses
I think all three of them are 1/2 siblings, but MC is the only one with a “commoner” mother/not an official wife so he was treated as an illegitimate child.
But MC does call her mother aunt, she was the only one who treated him normally like her own child, so I could be she’s a cousin but since they all grew up together they’re “siblings”.
The other guy and MC are definitely brothers by blood though.
Thanks for explaining. (◍•ᴗ•◍)
The chapters are kinda confusing. Is it because of the translation? And the Blondie is his sister but her surname is different, is she his half sister? But then how is he an illegitimate child? It's said that his mother was the "other woman" then his father's surname should be Lee but he is Kim. But his younger brother is also Kim so is his brother also illegitimate child? The family tree is confusing me. I think she's his cousin not half sibling. Or not! (