I kind of understand it from the rich family's pov, I mean, like someone just joined the class as the same time the heir joined the class. You want to investigate him for security purposes because it is just downright suspicious for someone to just appear with a fake document about his past school. It's fine if you want to investigate him, but it's a different matter if you physically influence his life.
I really find it hot if a seme has a mole beneath their eye, especially if it's in their left eye!!! Gawd... ε=ε=(ノ≧∇≦)ノ