If you read spilled blood (the spin off between the pie brother who loves teddy bears and his his other brother) you'll know that the teddy brother isn't blood related. I forgot the circumstances but yeah. That's why the relationship was possible .
Pls correct me if I'm wrong
Ml and older brother are blood related, they have the same parents. When they were younger mls dad brought younger brother to the house saying "he will be your younger brother". In reality , younger brother is the son of mls dad's crush or first love. After his first love and her husband got into a accident or something and died, he brought younger brother to them. The younger brother has a special condition where his blood doesn't stop whenever he gets a small scratch. So when the dad brought younger brother to the house, mls mother didn't like that and argues with the dad (obviously) ( they always argue, every single time). While they were arguing, the younger brother accident got hurt and the blood didn't stop coming out. So the older brother said he will take responsibility of the younger brother and took younger brother with him. And after 10 or so years, they got freaky with eachother, that's the start of "spilled blood"
So yeah, the older brother and younger brother are not blood related. In the "spilled blood" manhwa they really got freaky with eachother. The older brother was supposed to be a father like figure to the younger brother. When they were doing the shakalaka the younger brother even called the older brother "appa" !!???
Because the older brother asked him to call that otherwise he wouldn't fuck him(??). So ml and older brother are related and older brother and "younger brother" are in a relationship (??)
Can someone explain the three brothers situation? From what I know, eldest and "youngest" is not blood related? Who are full and halfbrothers with ML?