I keep rereading this because is the brother actually biological with Dojun? Because remem...

So u got any idea? I'm confused too are they related or not

They're biologically related. That is definitely what the mother told the creep. If she hesitated even for a sec, or even mentioned that dojun was adopted, the creep would've jumped him immediately. Personally, I would think it's creepy even between step brothers but yk

Yeah such a cute story,they had to bring in dark stuff

I try not to think too hard about it. It's just this authors side fetish. The main couple is what matters anyway hehe (=・ω・=)