Its not him who is powerful(yet), its his grandpa who is uber rich and loves him.. and Shin is the only inheritor on his maternal grandpa's side.. so yk he's gonna be rich just by existing.. its all about money and connections.. and the step-bro is kind of desperate atp, his parents want him to buddy up with Shin after all these years of treating him well in front of Shin while treating Shin like shit..
I think Shin's stepmother was actually hatching a plot to destroy Shin and for his stepbrother to seize control of the grandfather's empire. So she doesn't want them to get along; she sees Shin as the enemy and an obstacle to her boy inheriting everything. Thankfully the grandfather favors Shin and as a powerful awakened dominant alpha, Shin is brutal towards anyone who is out to get him or Yeonwoo ha ha
so easily persuaded lmaoo just mention shin and everyone sways off their main goal just for a chance to be in his circle. how powerful is the guy exactly