his dad was a yakuza boss but he died when seungjae was still pretty young. the old man who made seungjae's scar is another yakuza boss who'd been targeting seungjae's father before. after the father died, the old man gets seungjae's mom to marry him. so basically seungjae is not blood related to the old man nor the other guy with the scars on his face. they're basically his stepdad and brother. his stepbrother has an inferiority complex because despite seungjae not being a direct descendent to the family, he has more promise as the yakuza boss.
Omg thank you so much good person! Now i understand! Im gratefull (づ￣ ³￣)づ
Can someone olease explain me the family links of seung jae? I couldnt understand it