They're not blood related tho.
how?
Either it's just the way of calling older friend 'brother' or they're step brothers. It hasn't showed exact about it, but they're not blood related at all. The summary in chinese says it.
oh now i see thank you for telling me have a good day
It's the first one. He's calling him brother as a way of calling someone older than him. It's normal in china.
so i just came here and hadn't read it so i already read the description and all i can ask are they blood related? cuz nah ah inc*st for me fella