On cmon they're BROTHERS ತ_ʖತ
They're not related
Ooof dude do you read the same webtoon? they're not related
Oh... really? Where does it say they're not related? I just can't remember reading such information Σ(っ°Д °;)っ
Can't help you with the specific page here, but I remember it's not explicitly said/told. Also the author referring them as two men instead of brothers.
Oh ok (●'◡'●)ﾉ
I KNEW IT LOL I'VE READ THE RAWS & THERE'S NOTHING BL HAPPENED THERE (sadly)